Undying Crash with spikes?

`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)`

Start in src/main/java/net/hyper_pigeon/eldritch_mobs/ability/passive/defensive/UndyingAbility.java at line 41 and follow the onDamaged call shown in the stack trace. Reproduce damage from dungeonnowloading spikes, then verify that the same event no longer crashes with UnsupportedOperationException.

Written by the indexing model from the issue text.