If you have a spell with a requirement:

1 bone
And do not have a stack with Exactly 1 bone (stack of 2 bones, 3, etc.), the requirements will not be met or removed.

I'll look into it ASAP, but right now I have to finish a commit which is currently completely broken.

Inventory.contains() and Inventory.removeItem() may be what we need here.

That's what the helper methods use, so I'll need to add some code to fix the issue and probably do most of the removing/checking manually. I'm still trying to get groups to work, but I don't think that's going to happen tonight. Also, fyi these methods are being moved to SpellUtils a new class full of useful static methods for spell makers.

I might add that they remove every instance of the stack too. ex. if you have 2 stacks of exactly one bone meal, both will be removed

I don't know why there were 2 commits...