Minecraft version: 1.12.2
Wizardry version: 4.1.2
Environment: Singleplayer

Issue details: Just use "Trap spell" on Slime

Other mods involved: ActullyAdditions
AlternateFlux
AntiqueAtlas
AP2
AstralSorcery
Baubles
BiblioCraft
Bonfires
ChikenChunks
ElectroblobsWizardy
Embers
ExtraCells
HorsePower
IceAndFire
Immersive Ingineering (petroleum)
JEI
JER
MegaLoot
NuclearCraft
OpenGlider
OptiFine
Prefab
Roots
SimpleRPG
StorageDrawlers
TConstract (TinkerToolLeveling)
Thaumcraft
ThermalExpansion (Dynamics, Foundation)
TTRF
xRay
+Libraries for mods

Link to crash report (if applicable):
crash-2018-06-17_11.26.03-client.txt

This is actually the same issue as #15, it's caused by Optifine.