If the golems are classed as elementals then that would be nuts but if not then it is pointless. 

I feel like the problem is if you're that late into the game the opponent probably has some equally powerful clear that ignores the defense mechanism.  Priest certainly does.

Even if you can cheat it out, wouldn't you rather cheat out Drakefire Amulet? The only advantage this has is that it can be replayed by Dawngrasp, though that might be enough for it to make the cut.

Depend on the meta, and why not both. 

Wow that is some powerful protection card.

I mean, if there's a way to cheat it out, sure. 8 mana is too late against aggro and pointless against slower decks.