Interesting, but clearly underpowered when compared to boneyard. I would give the creature it's ability at least.
I see. So the ability will stay, how about secondary? One or the other? Random? All?
What of effects? Are those included?
Perhaps I might keep effects (Momentum, Immortality, etc.) and
either the primary or the secondary if there are two. If there is only one, then it will stay.