Oculus, Eye of the Cosmos

Flying, Hexproof
When Oculus, Eye of the Cosmos enters the battlefield, shuffle your graveyard into your library.
Temporal Rings — At the beginning of your upkeep, choose one:
•Exile target creature
•Each opponent mills X cards, where X is the number of cards in your hand.
•Take an extra turn after this one. Exile Oculus at the beginning of that turn's end step.
If Oculus would leave the battlefield,instead shuffle
it into its owner’s library.