Odd crash, honestly. Wither and Blink stopped working as intended -- Wither did 1 damage ever like 20 ticks to everything including me and Blink didn't move me at all -- for like 5 minutes. I was editing the Blink spell before this crash. I'm not sure if it's important since I can't recreate it but it's something to look at I suppose.

https://pastebin.com/zdbZ3VgK