Minecraft version: 1.12.2
Wizardry version: 4.2.9 4.2.10
Environment: Singleplayer

Issue details: I was in the inventory looking for things to test, beforehand I had spawned in two wizards one evil one good, one of them killed the other. nothing happened for a while
the abyssalcraft cow, when killed turns itself into a demon cow. If its death is caused by the slime spell, the game will crash to desktop.

Other mods involved: abyssalcraft

Link to crash report (if applicable): https://pastebin.com/84ARMcTi

Okay, I'll see what I can do, thanks