java.lang.UnsupportedOperationException at com.google.common.collect.UnmodifiableIterator.remove(UnmodifiableIterator.java:50) at net.minecraft.class_1309.method_6012(class_1309.java:956) at net.hyper_pigeon.eldritch_mobs.ability.passive.defensive.UndyingAbility.onDamaged(UndyingAbility.java:41) at net.hyper_pigeon.eldritch_mobs.register.EldritchMobsEventListeners.lambda$init$1(EldritchMobsEventListeners.java:30) at net.hyper_pigeon.eldritch_mobs.ability.callback.onDamagedCallback.lambda$static$0(onDamagedCallback.java:13) at net.minecraft.class_1309.handler$hnd000$eldritch_mobs$applyOnDamageAbilities(class_1309.java:63187) at net.minecraft.class_1309.method_5643(class_1309.java:1246) at dev.hexnowloading.dungeonnowloading.block.SpikesBlock.method_9548(SpikesBlock.java:64) at net.minecraft.class_4970$class_4971.method_26178(class_4970.java:1121) at net.minecraft.class_1297.method_5852(class_1297.java:1137) at net.minecraft.class_1297.method_36974(class_1297.java:851) at net.minecraft.class_1297.method_5784(class_1297.java:799) at net.minecraft.class_1309.method_26318(class_1309.java:2312) at net.minecraft.class_1309.method_6091(class_1309.java:2232) at net.minecraft.class_1309.method_6007(class_1309.java:2719) at net.minecraft.class_1308.method_6007(class_1308.java:550) at net.minecraft.class_1588.method_6007(class_1588.java:44) at net.minecraft.class_1309.method_5773(class_1309.java:2419) at net.minecraft.class_1308.method_5773(class_1308.java:351) at net.minecraft.class_1548.method_5773(class_1548.java:161) at net.minecraft.class_3218.method_18762(class_3218.java:739) at net.minecraft.class_1937.method_18472(class_1937.java:480) at net.minecraft.class_3218.method_31420(class_3218.java:385) at net.minecraft.class_5574.method_31791(class_5574.java:54) at net.minecraft.class_3218.method_18765(class_3218.java:353) at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:897) at net.minecraft.class_3176.method_3813(class_3176.java:283) at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:824) at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:671) at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:265) at java.base/java.lang.Thread.run(Thread.java:1583)