Arna triggers causes a game error.

[jdmagtibay]

Hi. So this game error occur. Possibly because of [[Arna Kennerüd, Skycaptain]] with [[Helm of the Host]] equipped to it and a bestowed creature. So there are two Arna triggers on attack because there were already two copies of Arna. But I think it gets a conflict with copying the bestowed Aura. Here's the game error report.

Game error occurred:

java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
Server version: 1.4.52-V8‐beta1 (build: 2024-06-06 19:44)
Stack trace:
java.util.ArrayList.rangeCheck(ArrayList.java:659)
java.util.ArrayList.get(ArrayList.java:435)
mage.game.permanent.token.TokenImpl.putOntoBattlefieldHelper(TokenImpl.java:435)
mage.game.permanent.token.TokenImpl.putOntoBattlefield(TokenImpl.java:254)
mage.game.permanent.token.TokenImpl.putOntoBattlefield(TokenImpl.java:218)
mage.abilities.effects.common.CreateTokenCopyTargetEffect.apply(CreateTokenCopyTargetEffect.java:273)
mage.cards.a.ArnaKennerudSkycaptainTargetEffect.apply(ArnaKennerudSkycaptain.java:114)
mage.abilities.AbilityImpl.resolveMode(AbilityImpl.java:218)
mage.abilities.AbilityImpl.resolve(AbilityImpl.java:202)
mage.abilities.TriggeredAbilityImpl.resolve(TriggeredAbilityImpl.java:205)
mage.game.stack.StackAbility.resolve(StackAbility.java:85)
mage.game.GameImpl.resolve(GameImpl.java:1766)
mage.game.GameImpl.playPriority(GameImpl.java:1689)
mage.game.turn.Step.priority(Step.java:67)
mage.game.turn.Phase.playStep(Phase.java:205)
mage.game.turn.Phase.play(Phase.java:91)
mage.game.turn.Turn.play(Turn.java:137)
mage.game.GameImpl.playTurn(GameImpl.java:1123)
mage.game.GameImpl.play(GameImpl.java:1030)
mage.game.GameImpl.start(GameImpl.java:1006)
mage.server.game.GameWorker.call(GameWorker.java:34)
mage.server.game.GameWorker.call(GameWorker.java:15)
java.util.concurrent.FutureTask.run(FutureTask.java:266)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:750)

Thanks.

[github-actions]

Arna Kennerüd, Skycaptain - (Gatherer) (Scryfall) (EDHREC)

{2}{W}{U}{B}
Legendary Creature — Human Knight
4/4
Flying, lifelink
Ward—Discard a card.
Whenever a modified creature you control attacks, double the number of each kind of counter on it. Then for each nontoken permanent attached to it, create a token that's a copy of that permanent attached to that creature.

Helm of the Host - (Gatherer) (Scryfall) (EDHREC)

{4}
Legendary Artifact — Equipment
At the beginning of combat on your turn, create a token that's a copy of equipped creature, except the token isn't legendary. That token gains haste.
Equip {5}

[JayDi85]

Something wrong with miss aura’s targets: