I was playing in my 1.18.2 modded server, with a sword with several enchantments on it, when the server crashed and brought me to the multiplayer screen, after killing a mob from the mod Evilcraft. After some more testing, the same happened with entities from the mods Ars Nouveau and Twilight Forest, all three with a Ticking entity error, reading "java.lang.NullPointerException: Cannot invoke "com.verdantartifice.primalmagick.common.sources.SourceList.isEmpty()" because "affinities" is null", which I believe is caused by the Essence Thief enchantment, since the crash won't happen if I use the same swords with the same enchantments except for that one.

This issue should be fixed in the next release, currently planned as v3.2.0. Thank you for the bug report!