What type of card is Thassa's Oracle?

Q: What type of card is Thassa's Oracle?

Thassa's Oracle is a Creature — Merfolk Wizard. Its oracle text reads: "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.) Power/Toughness: 1/3"

Thassa's Oracle

Creature — Merfolk Wizard

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 in the mana costs of permanents you control counts toward your devotion to blue.)

Power/Toughness: 1/3

Set Theros Beyond Death

Rarity Rare

Mana Value 2

Artist Jesper Ejsing

Collector # 73

Scryfall

Why Play Thassa's Oracle

The primary appeal lies in its ability to instantly win games when your library is empty or nearly empty, making it a powerful finisher for combo decks. Most competitive builds use it as a two-card win condition alongside effects like Demonic Consultation or Tainted Pact that exile your entire library. Even without the instant win, the devotion-based library manipulation provides valuable card selection in blue-heavy decks, letting you set up future draws while building toward the win condition.

Format Notes

Dominates competitive play across Legacy, Vintage, and cEDH where fast combo decks thrive, leading to its ban in Historic due to format warping effects. In Pioneer and Modern, it sees play in dedicated combo shells but faces more disruption from faster, more interactive formats. Commander players frequently include it as both a combo piece and value engine, making it one of the most impactful blue creatures in multiplayer games.

Combos & Synergies

Demonic Consultation and Tainted Pact form the most notorious combos, exiling your library to guarantee the win condition trigger. Doomsday creates a perfect five-card pile that can immediately set up the win, while Laboratory Maniac provides redundancy for the empty library win effect. Cards like Jace, Wielder of Mysteries and Leveler also enable similar strategies, though Thassa's Oracle remains the most efficient and reliable option.

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