I have to admit I had a different interpretation of this card when I first read it. I thought that IF you destroyed a Permanent in some fashion (by Deflag, Pulvy, etc), THEN this card gets the +10 HP. It would still get a nice synergy with other gravity cards (GP and Catapult, for instance, and of course, the BH when it's "full"), but it's not this card itself that is doing the PC.
Based on everything else I've read here, that's not how it works...but maybe it should be.