Lost Seraph

Flying, Breach (As this creature enters the battle- field, exile the top card of your library until you reveal a creature card. Shuffle all other cards revealed this way into your library. When this creature leaves the battlefield, put the creature exiled this way onto the battlefield)
"When I first saw one, I thought the abominations had returned. Then I saw it smite a megaspider with a single strike. They are indeed powerful and motivated,