I prefer it with the "creatures with no ability" clause to, its a reasonable nerf which could keep the play cost low and people who use it will have to consider using more Basic creatures. I think it would go great with a boneyard and a few OTYugh's! 1/1 momentum skeletons. It would actualy be the first card to convince me to use the GRAVEyard instead of a boneyard in one of my rainbows decks.
No matter what, the gist of this card is really cool, I love it.