I'll probably try this with un-quinted scarabs in my rainbow deck, but it doesn't look like a good card for slower/control decks... nice for rushes, despite the cost, so hax shields, bone walls and eg. phase shields are once again gaining ground while shields like procrastination, permafrost, hope and other damage reducing shields are generally less useful against this. (with procrastination/permafrost they can simply play it while most of their creatures are not bubbled/frozen, and they certainly don't help much against fractal balls)
Also, one more card that nerfs miracle.