Teferi, Temporal Pilgrim

The Watcher in the Water enters tapped with nine stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Whenever you draw a card during an opponent's turn, create a 1/1 blue Tentacle creature token.

Whenever a Tentacle you control dies, untap up to one target Kraken and put a stun counter on up to one target nonland permanent.

+1: Scry 1, then draw a card.

−2: Return target creature to its owner's hand.

−8: You get an emblem with "Whenever an opponent casts their first spell each turn, counter that spell."

+1: Draw a card.

−3: Put target creature on top of its owner's library.

−8: Each creature target opponent controls phases out. Until the end of your next turn, they can't phase in. (Treat them and anything attached to them as though they don't exist.)

+1: Draw a card. At the beginning of the next end step, untap up to two lands.

−3: Put target nonland permanent into its owner's library third from the top.

−8: You get an emblem with "Whenever you draw a card, exile target permanent an opponent controls."

+1: Look at the top two cards of your library. Put one of them into your graveyard.

−3: Return another target nonland permanent to its owner's hand.

−8: Each player shuffles their hand and graveyard into their library. You draw seven cards.

As B.O.B. enters, create four 1/1 blue Beeble creature tokens.

The number of loyalty counters on B.O.B. is equal to the number of Beebles you control. (Create or sacrifice Beebles whenever B.O.B. gains or loses loyalty.)

+1: Up to X target Beebles can't be blocked this turn, where X is the number of cards in your hand.

−1: Draw a card.