Secret Lair Countdown

Preponderant Pearl

Sorcery

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Ponder

Secret Lair Drop

Serum Visions

Artifact

Sol Ring

Legendary Creature — Octopus Noble

When Llawan enters, return all blue creatures your opponents control to their owners' hands.
Your opponents can't cast blue creature spells.

Llawan, Cephalid Empress

Elemental

Creature — Merfolk Wizard

Protection from red
Elemental creatures you control get +1/+1.
When this creature enters, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)

Master of Waves

Legendary Enchantment Creature — God

Indestructible
As long as your devotion to blue is less than five, Thassa isn't a creature.
At the beginning of your end step, exile up to one other target creature you control, then return that card to the battlefield under your control.
{3}{U}: Tap another target creature.

Thassa, Deep-Dwelling

When this creature enters, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your library and the rest on the bottom of your library in a random order. If X is greater than or equal to the number of cards in your library, you win the game. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)