Describe the bug
When attacking with a weapon with the jewel of kirin it is causing an immediate crash with a log reporting:
cannot invoke damage source m_269533 because p_20122_ is null. it is on a @born_in_chaos soul saber
have attempted this with a regular diamond sword and has the same effect, but the crash report says "source" is null instead of p_20122_

To Reproduce
Steps to reproduce the behavior:

1. Attack Mob
2. Crash

Expected behavior
Mob takes a nice chunk of damage, especially if undead

ModPack
Concatenation 1.2.1 - 1.3.0