Creature — Merfolk Wizard
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.
Welcome to Oracles of the Coast!
The release of Thassa's Oracle in Theros Beyond Death gave players a powerful new victory condition. Since zero is greater than or equal to zero, an empty library with the Thassa's Oracle trigger on the stack wins the game.
Vintage, Legacy, Modern, Pioneer and even EDH can utilize our fishy friend.
Pick a format and dig in!