I know it's been said that if you don't have explicit permission from the creator of a move, it can't be used, so just giving credit isn't enough. However, what if it's a variation of the move, or an expansion of the idea? If I have an idea to expand upon Geoff Williams' "I hate David Copperfield" effect, and I give credit to him for inspiration, is that ok? Or, if a move from somewhere else inspired a move I created, for example, Chris Brown's Venus Trap control inspired one of my own, and it works totally different from his, would that be accepted?