The Blue Reverberation

Character	Reception

For the Impuritas Civitatis reception, see The Blue Reverberation (Ensemble).

The Blue Reverberation
Chapter	Star of the City
Invitation	Book of the Smiling Faces  Book of the Distortion
Acts	2
Floors	1
Max Units	5
Previous	Smiling Faces
Next	The Red Mist

“	It’s as I suspected. The Library has to ripen… Hang in there, Angelica. It won’t be long.	”
–Argalia

The reception of The Blue Reverberation is the reception of the Color Fixer Argalia. It is a two-Act reception with one Floor of up to 5 Librarians available for use. Argalia and his expendable followers make up the first guests of the center-left column of the Star of the City chapter.

This reception is the first personal visit made by Argalia to the Library, seeking out the power behind E.G.O. and Distortions and affirming the progress of his ultimate goal.

Formation

Act 1

• Church of Gears Worshipper ×5

Act 2

• Argalia ×1
• Church of Gears Worshipper ×4

Overview

Argalia's Combat Pages mainly support the Worshippers by giving them buffs and inflicting Nullify Power Nullify Power
Unaffected by Power-related effects for this Scene. to negate the Librarians' Power effects, though he will also occasionally use a Mass Attack Mass Attack
Targets every enemy. A successful hit destroys the target's Combat Page or action dice., Tempestuous Danza Tempestuous Danza ( 3)
Mass-Individual Mass Attack
Targets every enemy. A successful hit destroys the target's Combat Page or action dice.
Individual
If the dice roll is larger than the target's current die, they take damage, and the die is destroyed.
8~8 
7~7 
5~5 
3~4  , which has four sequential attacks. Otherwise, Argalia plays defensively by stacking a large number of Counter dice.

Argalia may inflict 4 stacks of VibrationVibration X
Can be stacked up to 7 on Librarians hit by the first die of Trails of Blue Trails of Blue ( 3)
On Use Target’s dice Power cannot be influenced by any effects next Scene
8~13 
5~7 
5~7 
5~7  , which is not mentioned in the Combat Page description. However, the VibrationVibration X
Can be stacked up to 7 effect does not have any actual effect in this reception.

All Combat Pages used by the Church of Gears Worshippers are centered around the Smoke Smoke
Amplifies damage taken by 5% per stack. At 9+ Smoke, all dice gain +1 Power. Stacks up to 10. -1 Smoke at the end of each Scene. status effect, inflicting it on opponents so that they take more damage and giving it to themselves in order to deal more damage.

Church of Gears Worshipper

All Church of Gears Worshippers start with one Speed Die.

Stats

	97 57 2~6
	Normal  Normal  Normal  Normal  Normal  Normal

Passive Abilities

 Puffy Brume
'Smoke' amplifies outgoing damage instead of incoming damage on this character
 Internal Combustion Engine
When gaining Smoke using Combat Pages, gain +1 additional stack.
 Meat Gear
The first Offensive die of each Combat Page deals +2-3 damage.
 Thought Gear
Evade Dice Power +1
 Stimulating Fumes
Once per Scene, if the character has 'Smoke', respond to a one-sided attack with a Block die [Roll: 1~(Smoke)]. (Not played in clashes where both characters use a Combat Page)

Drops

	Ｏ	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ
Book of a Church of Gears Worshipper	100%	100%	100%	100%	100%	100%
Count	1.4	2	2.6	3	3.5	4.2

Combat Bookshelf

[Switch to Table/Grid]

Vapour Vapour ( 3) On Use Gain 4 Smoke and draw 1 page 9~19  On Hit Inflict 3 Smoke	Defense Order Defense Order ( 2) On Use Gain 4 Smoke 7~10  4~8	Autonomous Rush Autonomous Rush ( 2) On Use Gain 2 Smoke 5~9  On Hit Inflict 2 Smoke 3~7
Assault Order Assault Order ( 2) On Use If target has 2 or more Smoke, all Offensive dice on this page gain +1 Power 2~6  4~8  3~8	Guidance of the Gears Guidance of the Gears ( 1) On Use Gain 2 Smoke. Restore 2 Light 3~7  4~6

Deck
Page	Cost		Description
Vapour	3		On Use Gain 4 Smoke and draw 1 page 9~19  On Hit Inflict 3 Smoke
Defense Order	2		On Use Gain 4 Smoke 7~10  4~8
Autonomous Rush	2		On Use Gain 2 Smoke 5~9  On Hit Inflict 2 Smoke 3~7
Assault Order	2		On Use If target has 2 or more Smoke, all Offensive dice on this page gain +1 Power 2~6  4~8  3~8
Guidance of the Gears	1		On Use Gain 2 Smoke. Restore 2 Light 3~7  4~6

Combat Dialogue

As of Library Of Ruina version 1.1.0.6a12, all combat dialogue for this reception does not play. This issue is specific to the English version of the game.

Combat Entrance As the… gear guides… Tell me how… to move next… Show me the path for me to walk…! Walk the path given to us… and we shall win for certain… Open thy head and listen to the sound… I am prepared to go into battle… Victory Cry We’re always led to the right path… Finished the battle… I will return now… Truly… You are essential to us… Death Why… have you brought me here… I’m not sure what should I do anymore… Please brighten the path ahead… Why… can’t I hear the sound…? Why is it so dim… …Can the gears… make faulty… judgement…? On Ally Death The gears shall… guide the rest of us to safety… There is nothing to worry about… This must be… the will of the person… Maybe that person’s gear was rusted… On Kill A wise… choice… See… The choices… cannot… be wrong… This rotation… is the only thing that protects me… At least… while I’m being shown my way… I have my own life…

Argalia

• Argalia starts with three Speed Dice, and can reach a maximum of four Speed Dice.
• Argalia flees from the reception upon being reduced to 250 HP.
• Argalia's Combat Page use is scripted, and will occur in the following pattern:
  1. Trails of Blue Trails of Blue ( 3)
     On Use Target’s dice Power cannot be influenced by any effects next Scene
     8~13 
     5~7 
     5~7 
     5~7  ×2, Scout Scout ( 1)
     5~8 
     4~6  On Hit Inflict 4 Bleed next Scene
     5~8 
     5~7  ×1
     • On the very first Scene of the Act, Argalia will use Scout Scout ( 1)
       5~8 
       4~6  On Hit Inflict 4 Bleed next Scene
       5~8 
       5~7  ×3 instead.
     • When Argalia has a fourth Dice Slot, he will play another copy of Scout Scout ( 1)
       5~8 
       4~6  On Hit Inflict 4 Bleed next Scene
       5~8 
       5~7  .
  2. Trails of Blue Trails of Blue ( 3)
     On Use Target’s dice Power cannot be influenced by any effects next Scene
     8~13 
     5~7 
     5~7 
     5~7  ×1, Preludio Preludio ( 2)
     4~6  On Hit Give 1 Strength and Endurance to all allies next Scene
     3~5  On Hit Give 1 Strength and Endurance to all allies next Scene
     5~7 
     5~7  ×2
     • If less than three Church of Gears Worshippers are alive, Argalia will instead play Trails of Blue Trails of Blue ( 3)
       On Use Target’s dice Power cannot be influenced by any effects next Scene
       8~13 
       5~7 
       5~7 
       5~7  ×2 and Scout Scout ( 1)
       5~8 
       4~6  On Hit Inflict 4 Bleed next Scene
       5~8 
       5~7  ×1.
     • When Argalia has a fourth Dice Slot, he will play another copy of Scout Scout ( 1)
       5~8 
       4~6  On Hit Inflict 4 Bleed next Scene
       5~8 
       5~7  .
  3. Preludio Preludio ( 2)
     4~6  On Hit Give 1 Strength and Endurance to all allies next Scene
     3~5  On Hit Give 1 Strength and Endurance to all allies next Scene
     5~7 
     5~7  ×1, Scout Scout ( 1)
     5~8 
     4~6  On Hit Inflict 4 Bleed next Scene
     5~8 
     5~7  ×2
     • If less than three Church of Gears Worshippers are alive, Argalia will play Trails of Blue Trails of Blue ( 3)
       On Use Target’s dice Power cannot be influenced by any effects next Scene
       8~13 
       5~7 
       5~7 
       5~7  instead of Preludio Preludio ( 2)
       4~6  On Hit Give 1 Strength and Endurance to all allies next Scene
       3~5  On Hit Give 1 Strength and Endurance to all allies next Scene
       5~7 
       5~7  .
     • When Argalia has a fourth Dice Slot, he will play another copy of Trails of Blue Trails of Blue ( 3)
       On Use Target’s dice Power cannot be influenced by any effects next Scene
       8~13 
       5~7 
       5~7 
       5~7  .
  4. Tempestuous Danza Tempestuous Danza ( 3)
     Mass-Individual Mass Attack
     Targets every enemy. A successful hit destroys the target's Combat Page or action dice.
     Individual
     If the dice roll is larger than the target's current die, they take damage, and the die is destroyed.
     8~8 
     7~7 
     5~5 
     3~4  ×1, Trails of Blue Trails of Blue ( 3)
     On Use Target’s dice Power cannot be influenced by any effects next Scene
     8~13 
     5~7 
     5~7 
     5~7  ×1, Scout Scout ( 1)
     5~8 
     4~6  On Hit Inflict 4 Bleed next Scene
     5~8 
     5~7  ×1
     • When Argalia has a fourth Dice Slot, he will play another copy of Scout Scout ( 1)
       5~8 
       4~6  On Hit Inflict 4 Bleed next Scene
       5~8 
       5~7  .

Stats

	500 350 2~6
	Normal  Normal  Normal  Normal  Normal  Normal

Passive Abilities

 Shimmering
At the start of each Scene, exhaust all pages in hand and deck; add new pages to hand. Their Cost becomes 0.
 The Blue Reverberation
Take no damage from Ranged Combat Pages.

Drops

Does not drop books.

Combat Bookshelf

[Switch to Table/Grid]

Trails of Blue Trails of Blue ( 3) On Use Target’s dice Power cannot be influenced by any effects next Scene 8~13  5~7  5~7  5~7	Preludio Preludio ( 2) 4~6  On Hit Give 1 Strength and Endurance to all allies next Scene 3~5  On Hit Give 1 Strength and Endurance to all allies next Scene 5~7  5~7	Scout Scout ( 1) 5~8  4~6  On Hit Inflict 4 Bleed next Scene 5~8  5~7
Tempestuous Danza Tempestuous Danza ( 3) Mass-Individual Mass Attack Targets every enemy. A successful hit destroys the target's Combat Page or action dice. Individual If the dice roll is larger than the target's current die, they take damage, and the die is destroyed. 8~8  7~7  5~5  3~4

Deck
Page	Cost		Description
Trails of Blue	3		On Use Target’s dice Power cannot be influenced by any effects next Scene 8~13  5~7  5~7  5~7
Preludio	2		4~6  On Hit Give 1 Strength and Endurance to all allies next Scene 3~5  On Hit Give 1 Strength and Endurance to all allies next Scene 5~7  5~7
Scout	1		5~8  4~6  On Hit Inflict 4 Bleed next Scene 5~8  5~7
Tempestuous Danza	3		Mass-Individual Mass Attack Targets every enemy. A successful hit destroys the target's Combat Page or action dice. Individual If the dice roll is larger than the target's current die, they take damage, and the die is destroyed. 8~8  7~7  5~5  3~4

Combat Dialogue

Argalia has two special combat dialogue sets, one if he is facing Gebura and one if he is facing Roland. However, as of Library Of Ruina version 1.1.0.6a12, all combat dialogue for this reception does not play. This issue is specific to the English version of the game.

Combat Entrance Is it not time yet… for the splendid curtain to rise? The stage calls for us. We should gladly play along. Let’s not play too rough. Neither you nor I can reach it just yet… Victory Cry Until next time. We’ll meet again soon. Death The answer seems to be here… But the fruit isn’t sweet enough just yet. …I’ll pay you another visit once it’s more ripe. On Ally Death Simply returned to where they belong. I’m sure Eileen will be overjoyed to know how helpful you were. Yes… You were easily broken because you were imperfect. No need to bother about the inevitable. On Kill As I thought… It’s still incomplete. You’re still too fragile. How pitiful… Did you really think you were ready to invite me? What a pity. I was looking forward to this occasion. I was wondering how long your… little lungs could keep breathing.

Combat Entrance What’s this…? Haha… I was wondering where the Red Mist could’ve disappeared to… Wouldn’t it be hilarious if the public learned that you’re stuck as a servant in some odd place now? Victory Cry This fight had much room for improvement. Death Still entertaining… Although, I’ve yet to see exactly what I want here. On Ally Death Simply returned to where they belong. I’m sure Eileen will be overjoyed to know how helpful you were. Yes… You were easily broken because you were imperfect. No need to bother about the inevitable. On Kill As I thought… It’s still incomplete. You’re still too fragile. How pitiful… Did you really think you were ready to invite me? What a pity. I was looking forward to this occasion. I was wondering how long your… little lungs could keep breathing. Special Event This was not the Red Mist I was hoping to see.

Special Event line notes Was used as the On Kill line for Gebura.

Combat Entrance I was wondering where you’d run off to after you’d gone mad… and here you are. Let’s pick up where we left off, shall we? Victory Cry I’ll put these books to good use. Death Let’s meet again after you’ve prepared yourselves more… thoroughly. On Ally Death Simply returned to where they belong. I’m sure Eileen will be overjoyed to know how helpful you were. Yes… You were easily broken because you were imperfect. No need to bother about the inevitable. On Kill As I thought… It’s still incomplete. You’re still too fragile. How pitiful… Did you really think you were ready to invite me? What a pity. I was looking forward to this occasion. I was wondering how long your… little lungs could keep breathing. Special Event Haha… I seriously can’t believe I let her love this man.

Special Event line notes Was used as the On Kill line for Roland.

Church of Gears Worshipper

All Church of Gears Worshippers start with one Speed Die.

Stats

	97 57 2~6
	Normal  Normal  Normal  Normal  Normal  Normal

Passive Abilities

 Puffy Brume
'Smoke' amplifies outgoing damage instead of incoming damage on this character
 Internal Combustion Engine
When gaining Smoke using Combat Pages, gain +1 additional stack.
 Meat Gear
The first Offensive die of each Combat Page deals +2-3 damage.
 Thought Gear
Evade Dice Power +1
 Stimulating Fumes
Once per Scene, if the character has 'Smoke', respond to a one-sided attack with a Block die [Roll: 1~(Smoke)]. (Not played in clashes where both characters use a Combat Page)

Drops

	Ｏ	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ
Book of a Church of Gears Worshipper	100%	100%	100%	100%	100%	100%
Count	1.4	2	2.6	3	3.5	4.2

Combat Bookshelf

[Switch to Table/Grid]

Vapour Vapour ( 3) On Use Gain 4 Smoke and draw 1 page 9~19  On Hit Inflict 3 Smoke	Defense Order Defense Order ( 2) On Use Gain 4 Smoke 7~10  4~8	Autonomous Rush Autonomous Rush ( 2) On Use Gain 2 Smoke 5~9  On Hit Inflict 2 Smoke 3~7
Assault Order Assault Order ( 2) On Use If target has 2 or more Smoke, all Offensive dice on this page gain +1 Power 2~6  4~8  3~8	Guidance of the Gears Guidance of the Gears ( 1) On Use Gain 2 Smoke. Restore 2 Light 3~7  4~6

Deck
Page	Cost		Description
Vapour	3		On Use Gain 4 Smoke and draw 1 page 9~19  On Hit Inflict 3 Smoke
Defense Order	2		On Use Gain 4 Smoke 7~10  4~8
Autonomous Rush	2		On Use Gain 2 Smoke 5~9  On Hit Inflict 2 Smoke 3~7
Assault Order	2		On Use If target has 2 or more Smoke, all Offensive dice on this page gain +1 Power 2~6  4~8  3~8
Guidance of the Gears	1		On Use Gain 2 Smoke. Restore 2 Light 3~7  4~6

Combat Dialogue

As of Library Of Ruina version 1.1.0.6a12, all combat dialogue for this reception does not play. This issue is specific to the English version of the game.

Combat Entrance As the… gear guides… Tell me how… to move next… Show me the path for me to walk…! Walk the path given to us… and we shall win for certain… Open thy head and listen to the sound… I am prepared to go into battle… Victory Cry We’re always led to the right path… Finished the battle… I will return now… Truly… You are essential to us… Death Why… have you brought me here… I’m not sure what should I do anymore… Please brighten the path ahead… Why… can’t I hear the sound…? Why is it so dim… …Can the gears… make faulty… judgement…? On Ally Death The gears shall… guide the rest of us to safety… There is nothing to worry about… This must be… the will of the person… Maybe that person’s gear was rusted… On Kill A wise… choice… See… The choices… cannot… be wrong… This rotation… is the only thing that protects me… At least… while I’m being shown my way… I have my own life…

Librarians' Combat Dialogue

Gebura and Roland have unique combat dialogue if they are used in this reception. However, as of Library Of Ruina version 1.1.0.6a12, all unique dialogue for this reception does not play. This issue is specific to the English version of the game.

Gebura

Combat Entrance …Private talk is unnecessary. We’re in battle. Shut it. Both of us have goals to achieve. Victory Cry …That wasn’t a satisfying conclusion. Death This is frustrating… But I’ve got to accept it. On Ally Death Even if others face an unfortunate fate, I can’t stop here. You don’t want their sacrifice to be in vain, do you? Don’t be afraid. We have to trust ourselves to win this. There’s no reason we can’t emerge victorious. Stay calm, everyone. Special Event Sigh… You damn coward.

Special Event line notes Was used as the On Kill line for when Argalia flees.

Roland

Combat Entrance You don’t say, Blue Sicko. I don’t think I have anything to say to you. Victory Cry Feels as if I didn’t get to finish the job properly… Death Dammit… I can’t let it end like this… On Ally Death …Stay calm. Don’t panic. I’ll have to try harder to make up for them… Special Event Seriously? …You’re gonna wimp out like that?

Special Event line notes Was used as the On Kill line for when Argalia flees.

Drops

	Key Pages	Combat Pages
Book of a Church of Gears Worshipper	A Church of Gears Worshipper’s Page ×1  ×1  ×1  ×1  ×1  ×0.5  Puffy Brume 'Smoke' amplifies outgoing damage instead of incoming damage on this character  Internal Combustion Engine When gaining Smoke using Combat Pages, gain +1 additional stack.  Meat Gear The first Offensive die of each Combat Page deals +2-3 damage.  Thought Gear Evade Dice Power +1 ×5	Defense Order Defense Order ( 2) On Use Gain 4 Smoke 7~10  4~8  ×5 Guidance of the Gears Guidance of the Gears ( 1) On Use Gain 2 Smoke. Restore 2 Light 3~7  4~6  ×5 Autonomous Rush Autonomous Rush ( 2) On Use Gain 2 Smoke 5~9  On Hit Inflict 2 Smoke 3~7  ×6 Assault Order Assault Order ( 2) On Use If target has 2 or more Smoke, all Offensive dice on this page gain +1 Power 2~6  4~8  3~8  ×6 Vapour Vapour ( 3) On Use Gain 4 Smoke and draw 1 page 9~19  On Hit Inflict 3 Smoke ×6

Combat Pages

Combat Pages

Page	Cost	Range	Description	Obtained
Vapour	3		On Use Gain 4 Smoke and draw 1 page 9~19  On Hit Inflict 3 Smoke	Book of a Church of Gears Worshipper
Defense Order	2		On Use Gain 4 Smoke 7~10  4~8	Book of a Church of Gears Worshipper
Autonomous Rush	2		On Use Gain 2 Smoke 5~9  On Hit Inflict 2 Smoke 3~7	Book of a Church of Gears Worshipper
Assault Order	2		On Use If target has 2 or more Smoke, all Offensive dice on this page gain +1 Power 2~6  4~8  3~8	Book of a Church of Gears Worshipper
Guidance of the Gears	1		On Use Gain 2 Smoke. Restore 2 Light 3~7  4~6	Book of a Church of Gears Worshipper

Story

Episode Summary

Pre-Battle

In a dilapidated laboratory in the Outskirts, Argalia sighs with disappointment while Eileen and Pluto accompany him because no one is able to answer his questions. It is revealed that he is interrogating a group of Outskirts residents who are squatting in the laboratory. When one of them speaks up, he immediately kills her and asks the remaining ones about The Red Mist, who gained her E.G.O. after coming to the laboratory, now revealed to be the original research site of the Seed of Light Project. The squatters beg to be left alone, especially because "monsters" are about to arrive, but Argalia simply kills each one who protests. He mentions that Lobotomy Corporation, the Library, and the former laboratory are his only leads into the power of E.G.O. following the advice of "her charming voice".

Argalia begins to reminisce about the Pianist, the destruction it left in its wake, and the death of his sister Angelica because of its rampage. Argalia came too late and only saw the aftermath, someone else having already killed the Pianist. He found his sister dead, made into part of the Pianist's piano. He claims that this didn't horrify him; instead, he found it beautiful. A squatter interrupts him in fear because the monsters of the Outskirts are about to reach them, and Argalia calmly continues reminiscing while he walks over and kills them.

Argalia says that he and his sister were far too disconnected in life, and he disapproved of her marriage to an "imbecile". However, in death, all their feelings could be laid bare. Despairing yet awestruck, he was convinced — with the advice of a "gentle voice" — to create a performance as glorious as that of the Pianist to honor his sister. In the meantime, he kills another Outskirts resident who interrupts him.

Argalia prepares to visit the Library

Another Outskirts resident screams because the monsters, "Clockwork Teeth", have arrived. Argalia is not impressed and orders Pluto and Eileen to act; Eileen immediately shuts down the monsters, claiming that clockwork is inferior to gears. Argalia kills a shocked squatter and continues his story. He eventually realized that the Red Mist and the Pianist both had the same power at their core, killing one last squatter as he speaks. Annoyed that he hasn't learned anything from the Library, he makes a show of unveiling an invitation and asks Eileen to give him some of her worshippers for backup. He orders Pluto and Eileen to stay behind, as he intends to return, since his goal is "not ripe yet".

Back in the Library, Roland points out the two Distortions accompanying Argalia. Angela comments that Argalia holds sadness in his face; Roland says that the "Blue Sicko" has simply gone mad with grief because of his sister's death, unstoppable because of his sheer power. Angela comments on the similarity of her name and Angelica's; Roland assumes that they bear the same meaning. Angela also asks him about the Clockwork Teeth. Roland doesn't answer her directly, but he says that the Outskirts is where "impurities" of the City are expelled to by the Head. Most such "impurities" are manmade but non-human sentients or other entities from far outside the City... a category including Angela herself.

At the entrance of the Library, Angela immediately arrives to greet Argalia. The latter is shocked at seeing her, mistaking her for Angelica, but quickly corrects himself and notes that Angelica could never be such a "hideous" thing. Angela loses her patience. Argalia muses to himself about the power of the Library and resolves to pursue it further.

Post-Battle

Roland and Angela complain about letting Argalia escape. Roland was looking forward to reading Argalia's book, which he claims to be for personal reasons. Angela mentions that Argalia was interested in the Red Mist, so a book about the Red Mist could potentially lure him back to the Library. Roland is skeptical since the original Red Mist no longer exists, but Angela believes she can circumvent this.

Angela changes the topic, asking Roland whether the Blue Reverberation might know that she indirectly killed Angelica by causing the Distortion. Roland thinks it is possible, so Angela surmises that Argalia may want revenge on her before realizing that anyone who suffered because of Distortions would resent her. Roland replies ambiguously and asks if she regrets her choices. Angela is unsure, but she doesn't like the idea that more and more people are coming to hate her. She redirects the blame to Ayin for trapping her and leading her to lash out against the City, disregarding Argalia's vengeance as just another conflict between her own desires and others' desires. Roland plays yes man to her response.

Background

It was previously shown that Argalia had been building a team of Distortions and sending fodder to the Library. Eileen, for example, was recruited by him after he rescued her from assassination by Full-Stop Office, whose Fixers were then forced into the Library. Here, Argalia's motivations finally begin to be revealed.

Argalia was devoted to his sister Angelica, and he was sent into despair by her death by the performance of the Pianist, a Distortion. However, a mysterious voice soothed him and convinced him to celebrate her memory by creating a grand performance to rival the Pianist, advising him to seek out the power that created the Pianist, the power developed by Lobotomy Corporation: the Light.

Battle Symbols

There is one Battle Symbol associated with this reception.

Battle Symbol	Name	Slot
	Meat Gear	Headwear 4
	Effect
	5% chance to boost attack damage by +1 when attacking a target with 10+ Smoke
	Condition
	During a single Act of a Star of the City-level reception, deal 40 or more damage to a single target with 10+ Smoke in a single attack.

Gallery

• 

  Argalia

• 

  Dialogue background - A Laboratory in the Outskirts