My question is about the "powerful" part. Does it mean that the spell works on higher-level opponents (as I suspect is the case) or that you can use Revenant to raise a wolf and that wolf would be more powerful than if you used Raise Zombie to raise a wolf. I don't think the latter is correct but then I started second guessing myself.
Sorry for the somewhat ignorant post, but some clarification would be much appreciated!
Cheers!