#109 because I have a mod that inject the method player.addExperienceLevels(-amount) to avoid exp cost, but it doesn't affect the waystones, so I find the reason that waystones mod uses player.experienceLevel -= amount;.

So I suggest that using the method player.addExperienceLevels(-amount) to replace it for better mod capability.

If you think this is not a good suggestion, I will feel sorry and won't mention it again.

Took a bit, but done 👍
(Also, not sure if you're doing the injection for waystones-only, but if so, you can disable the cost in the configs)

Thank you! Actually I know how to disable the cost in the configs, but I still think that it deserves to make this modification.