Found an error that causes the game to crash when casting Mutilation. Do note that I also have a relic, which prevents damage from being done, though I fail to see how this would cause the error shown below.

23:22:45.860 INFO ThMod.ThMod> ThMod : Card used : Fiend:FiendMutilation ; cost : 2
Exception: java.lang.ArithmeticException: / by zero
23:22:45.865 ERROR core.CardCrawlGame> Exception caught
java.lang.ArithmeticException: / by zero
at fiendmod.cards.FiendMutilation.use(FiendMutilation.java:59) ~[FiendMod.jar:?]
at com.evacipated.cardcrawl.mod.hubris.patches.ZylophonePatch$MultiUse.use(ZylophonePatch.java:51) ~[Hubris.jar:?]
at com.megacrit.cardcrawl.characters.AbstractPlayer.useCard(AbstractPlayer.java:1594) ~[?:?]
at com.megacrit.cardcrawl.actions.GameActionManager.getNextAction(GameActionManager.java:297) ~[?:?]
at com.megacrit.cardcrawl.actions.GameActionManager.update(GameActionManager.java:151) ~[?:?]
at com.megacrit.cardcrawl.rooms.AbstractRoom.update(AbstractRoom.java:279) ~[?:?]
at com.megacrit.cardcrawl.rooms.EventRoom.update(EventRoom.java:53) ~[desktop-1.0.jar:?]
at com.megacrit.cardcrawl.dungeons.AbstractDungeon.update(AbstractDungeon.java:2552) ~[?:?]
at com.megacrit.cardcrawl.core.CardCrawlGame.update(CardCrawlGame.java:878) ~[?:?]
at com.megacrit.cardcrawl.core.CardCrawlGame.render(CardCrawlGame.java:429) [?:?]
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:225) [?:?]
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:126) [desktop-1.0.jar:?]
Controllers: removed manager for application, 0 managers active
Game closed.

If you could take a look at this, I'd greatly appreciate it! Let me know if you need anything else!