I think you are aware of this.

but running 1.20 minecraft with hexal (hexal-fabric-1.20.1-0.3.0-2.jar)

I cast a cycle wisp and the client crashed.
when I tried to rejoin world again the client crashed

wisp_crash-2024-08-28_06.11.55-server.txt

seconding this, just happened to me. crash error:

The game crashed whilst ticking player
Error: java.lang.AbstractMethodError: Receiver class ram.talia.hexal.api.casting.eval.env.WispCastEnv does not define or inherit an implementation of the resolved method 'abstract net.minecraft.world.entity.LivingEntity getCastingEntity()' of abstract class at.petrak.hexcasting.api.casting.eval.CastingEnvironment.

i assume its due to a wisp casting mind's reflection? i was trying to get the player view direction

the entire world will now not load anymore because of this.