Minecraft version: 1.12.2
Wizardry version: 4.3.4
Environment: Singleplayer

Issue details:
Hello, I'm back with the exact problem with possession from before.
Whenever I try to cast Possession (On any mob, I've tried everything I think) my game horribly lags, but when I press shift and my character gets back to normal, everything turns back alright.
As you told me to do before, I'll use LagGoggles and show the analysis.
This time, I'm using some more mods, and I don't know if any of them caused the problem or not.
I'll list all of them, just in case.

Other mods involved: (I'm sorry if the list is too long)

• Ancient Spellcraft
• Art's Effects Spell Pack
• Arte Magicum
• Electroblob's Wizardry (of course)
• Extra Golems
• Extra Spells
• GameIdiot's Craftable Wizardry Items
• Grimoire of Gaia
• Just Enough Items
• LLibrary
• Mo's spells
• Mowzie's Mobs
• Patchouli
• Seed for Wizardry (unofficial updated version)
• Twilight Forest
• Wizardry - Fates
• Wizardry Golems
• Wizardry Tales
• Zettai Grimoires
• Zettai Magic
  
  
  

Link to crash report: No link

Testing indicates the issue appears when Ancient Spellcraft is installed (tried with just ebwizardry, ancient spellcraft, and lag goggles), the possession filter also fails to render

Lag goggles FPS profile (5 seconds)

in the log file the line "Could not find uniform named InSize in the specified shader program." shows up many times per second when possession is active, without Ancient Spellcraft it shows up 3 times upon cast, regardless of how possession last.