He doesn't really do anything against snow graves does he?

No. The Snow Graves are still right where they were. You control them now - congratulations and whoopee. But they're still in your way.

I still hope one day that there will be an errata regarding taking control of attachment cards that will let you re-attach them to another eligible card and make these effects worthwhile.

kamacausey said:

Not by himself… no.

And honestly… I wish he did these days. Oh well.