Thassa's Oracle [Theros Beyond Death] Demon Construct Set: Secret Lair Drop Series

Set: Secret Lair Drop Series Type: Creature — Faerie Wizard Rarity: Rare Cost: {1}{U} Flash

Set: Core Set 2021 Prerelease Promos Type: Creature — Spirit Rogue Rarity: Rare Cost: {1}{U} Whenever Ghostly Pilferer becomes untapped

and it has this ability

Annihilator 6

Heretical Healer

Thassa's Oracle [Theros Beyond Death] Demon Construct Set: Secret Lair Drop SeriesSet: Theros Beyond Death Type: Creature Merfolk Wizard Rarity: Rare Cost: {U}{U} When Thassa's Oracle enters the battlefield, 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