> So you can't have a spell called "arcane missile" that does 1d4 damage every 2 levels of the caster? I think you can. I don't think copyright covers gameplay

> So you can't have a spell called "arcane missile" that does 1d4 damage every 2 levels of the caster? I think you can. I don't think copyright covers gameplay mechanisms, it just covers the actual text of the rules. As long as you don't copy the actual text describing D&D's arcane missile, you can have it in your game. But IANAL.