Artifacts: MASSIVE error when using Consume skill with an item

Artifacts: 0.1.6
MythicMobs: 4.0.1
Spigot 1.11.2 R0.1 Snapshot (Latest version, according to /version)

I'm trying to create an item that steals health from enemies while it's in a player's inventory. As far as I can tell, the item syntax is correct, and everything is set up as it should be.

Thought it was probably a good idea to just put this in pastebin, since the error is over 2k lines long!

https://pastebin.com/86jSXPtL

Here's the item I'm trying to use:

Item file:...

Artifacts: MASSIVE error when using Consume skill with an item