It's a great card when your metagame has been getting complacent about removal. If a standard removal suite for decks in your area has become "Oblivion Stone and three or four cards that can tutor it up/recur it", equipping this on a win-con will probably give you the game.
I'll admit it's not the strongest protection spell out there, though. That honor (IMO) goes to Vanishing; get this card to stick on a creature and as long as you don't get greedy and keep at least UUUU available, opponents are going to have a really tough time getting rid of it.
I'll admit it's not the strongest protection spell out there, though. That honor (IMO) goes to Vanishing; get this card to stick on a creature and as long as you don't get greedy and keep at least UUUU available, opponents are going to have a really tough time getting rid of it.