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Thassa's Oracle
Price$21.20 – $118.12
Buy on TCGplayer

Thassa's Oracle

{U}{U}

Creature — Merfolk Wizard

LegalGame Changer Salt 2.59Rank #411

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.)

1/3

Why is this card good?

The premier "win the game" combo finisher in cEDH and high-power decks. Thassa's Oracle won the format. Unlike Laboratory Maniac, it doesn't require you to draw from an empty library — its ETB checks devotion against library size, so even if you have a card or two left, you often still win. That extra forgiveness makes it dramatically safer and easier to assemble. It's the payoff for self-mill and "draw your whole deck" lines: Demonic Consultation or Tainted Pact (exile your library, then Oracle wins on ETB), Ad Nauseam piles, or Hermit Druid stacks. Any blue combo deck running fast mana and tutors wants it. It pairs naturally with commanders like Thrasios, Tymna pods, and Kinnan. When NOT to play it: if you're not building a dedicated combo deck, it's a do-nothing 1/3. It also dies to instant-speed countermagic/removal in response to the trigger, so you need protection or a stocked hand. Casual tables often consider it a feel-bad "I win now" button — read the room.

Related cards

Laboratory ManiacU

Alternate win condition that triggers when drawing from empty library.

Jace, Wielder of MysteriesU

Planeswalker that wins when you draw from empty library, redundant payoff.

Demonic ConsultationB

Exiles library to enable instant Oracle win.

Tainted PactB

Empties library to set up Oracle win combo.

DoomsdayB

Sets up minimal library for guaranteed Oracle wins.

Hermit DruidG

Mills your own library to empty it for win-cons.

Gaea's BlessingG

Protects against decking and counters opposing self-mill wins.

Cephalid IllusionistU

Self-mill engine to empty library for alternate win.

Printings (6)

mb2Mystery Booster 2 · #175R$21.20Buy
sldSecret Lair Drop · #1280R$118.12Buy
thbTheros Beyond Death · #73R$22.73Buy
thbTheros Beyond Death · #308R$31.34Buy
pthbTheros Beyond Death Promos · #73sR$55.40Buy
pthbTheros Beyond Death Promos · #73pR$24.00Buy

Rulings (6)

  • 2020-01-24

    If your devotion to blue is zero at the time the triggered ability of Thassa's Oracle resolves, you don't look at or move any cards in your library. If you have no cards in your library, you win the game.

  • 2020-01-24

    Colorless and generic mana symbols ({C}, {0}, {1}, {2}, {X}, and so on) in mana costs of permanents you control don't count toward your devotion to any color.

  • 2020-01-24

    Mana symbols in the text boxes of permanents you control don't count toward your devotion to any color.

  • 2020-01-24

    Hybrid mana symbols, monocolored hybrid mana symbols, and Phyrexian mana symbols do count toward your devotion to their color(s).

  • 2020-01-24

    If an activated ability or triggered ability has an effect that depends on your devotion to a color, you count the number of mana symbols of that color among the mana costs of permanents you control as the ability resolves. The permanent with that ability will be counted if it's still on the battlefield at that time.

  • 2020-01-24

    If you put an Aura on an opponent's permanent, you still control the Aura, and mana symbols in its mana cost count towards your devotion.

Discussion (0)