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Minecraft version: 1.12.2
Wizardry version: 4.3.5
Its a multiplayer server

Issue details:
I tried using the ward spell and, it crashed me back to the main launcher.

Other mods involved: [only list mods that are relevant to the problem]
Im not sure what could be causing this.

Link to crash report (if applicable): [give a link to the crash report on gist, pastebin, etc.]
https://pastebin.com/5yewQwGU

Sorry for the inconvenience,
Hunter

Known issue of 4.3.5, revert to v4.3.4 till a fix is released

Fixed in v4.3.6

Note if you are using the Ancient Spellcraft addon - be sure to check the file changelog on CurseForge for an additional step to stop the crash.