Sloth, The First Somnomancer

Defender, Indestructible Sloth’s toughness is equal to the number of creatures with stun counters on them. Whenever a creature becomes tapped, put X stun counters on it where X is it’s power. At the beginning of your upkeep, if every creature has a stun counter on it, you may pay 5 life and search your library for another Sin, reveal it, then put it in your hand.