Vetru, the Subterfuge

Flying, deathtouch, lifelink
At the beginning of your end step, each player reveals the top card of their library. For each nonland card revealed this way, put a +1/+1 counter on Vetru, the Subterfuge. Then each player puts the revealed card into their hand and loses 1 life.
"They say if you talk about him you'll go mis..." - Adelia, missing