I noticed this happening when I combined the pearl with the staff, I'm not quite sure tho but that's my best guess.

Spells do not consume mana neither does the action it's suppose to, E.G: Burn projectile on entity (this only happens in multiplayer).

Modpack Base: All The Mods 3
Actual Modpack: All The Cats 3 (on Technic Launcher)

https://hastebin.com/ekovumumub.rb

Can you reproduce the issue every time consistently? Which version of liblib are you using?

The part of trying to use spells still doesn't work.
wizardry-0.9.9
librarianlib-1.12.2-4.15

did you run a wizardry command?

packet removed. Shouldn't be a problem later on.