Thanos

{t}, {p/c}Pay 1 life: Put 1 Infinity counter on Thanos
{t}: Exile X creatures and planeswalkers at random, where X is half the number of creatures and planeswalkers in play. Activate this ability only if Thanos has 6 Infinity counters on him.
When you play Thanos from you hand onto the battlefield, instead put him into exile. After each of your turns, put one Infinity counter on Thanos. When Thanos has 5 Infinity counters on him, put Thanos onto the battlefield tapped.