
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.)
Thassa's Oracle has 7 printings, first in Theros Beyond Death (2020). EDHREC ranks it #461 among Commander cards. It appears most in Kraum, Ludevic's Opus // Tymna the Weaver decks (10,750 on EDHREC). It has 6 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.