Issue (The better the description the better i can solve the issue):

Crash whenever you start the world

Steps to reproduce:

Create a new world and start it

Affected Versions (Latest is NOT a version):

Minecraft: 1.12.2
Forge: 14.23.5.2847  
TenshiLib: 1.2.3
Improved Mobs: 1.6.2

Other Mods (If you think it might be cause of an incompability):

Realistic Terrain Generation (rtg), Vanilla Tech (vanillatech), Hammer Core (hammercore)

Logs (Use a site like pastebin, gist etc. DONT COPY PASTE THE LOG IN HERE):

https://paste.dimdev.org/gahatipuco.mccrash

duplicate of #28