Crash report: https://gist.github.com/kwpugh/4f8254593826ae084d19d13ff6c64930

Your mixin into ExperienceOrbEntityMixin is failing. I think you have the notation incorrect. I don't think you need the V argument.

@Inject(at = @at("HEAD"), method = "onPlayerCollision()V")

Also, it is good practice to add your mod name into the method name to avoid confusion.

@Inject(at = @At("HEAD"), method = "onPlayerCollision")
public void gobberCheckForMedallion(PlayerEntity player, CallbackInfo ci)

This is the problem:

I changed it to this and updated your Loom to 0.11 (recommended for 1.18+

No build errors or crashes after that.

That was already on my todo list ;)

I use Cloth Config API across all my mods and have found it very easy to implement.

Working on it!

Given the high damage/durability and such in the mod, it might make it more versatile for players if you add a config system to adjust the tool/armor values and effect durations and such.

Good work so far.

Nice, thanks.

Also, have config options for each effect in the block would be nice for tailoring. Good luck.