MagicTheGathering.fyi

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

CMC
2
Mana cost
{U}{U}
Color identity
U
Rarity
rare
Set
Secret Lair Drop
Price
$115.89
EDHREC rank
#408
Buy on TCGplayer
Thassa's Oracle card art
Thassa's Oracle wins the game on the spot for two mana — enter the battlefield, library empty, trigger resolves, done. Pair it with Demonic Consultation or any instant-speed mill effect and you have the most compact combo kill in Commander; Rograkh, Son of Rohgahh // Silas Renn, Seeker Adept decks run it at over 92% inclusion for exactly this reason.

Best Commanders

Commanders with the highest synergy

01
Rograkh, Son of RohgahhSilas Renn, Seeker Adept

Rograkh, Son of Rohgahh // Silas Renn, Seeker Adept

92.2% of decks · synergy 0.84

Silas Renn's blue identity unlocks Thassa's Oracle, and the partner shell's access to artifact tutors means assembling the Oracle combo is fast and consistent. Over 92% of these decks include it because it's the cleanest two-card kill available in Dimir.

02
Tevesh Szat, Doom of FoolsThrasios, Triton Hero

Tevesh Szat, Doom of Fools // Thrasios, Triton Hero

74.5% of decks · synergy 0.67

Thrasios, Triton Hero generates infinite mana through any of several common loops, and Thassa's Oracle is the cleanest way to convert that infinite mana into an immediate win by drawing out the deck. The pairing shows up in nearly 75% of Tevesh Szat, Doom of Fools // Thrasios, Triton Hero lists.

03
Malcolm, Keen-Eyed NavigatorVial Smasher the Fierce

Malcolm, Keen-Eyed Navigator // Vial Smasher the Fierce

72.9% of decks · synergy 0.64

Malcolm, Keen-Eyed Navigator // Vial Smasher the Fierce runs a storm-adjacent game plan that can empty or near-empty the library through chain-casting, making Thassa's Oracle the natural payoff that converts the engine into a win. Nearly 73% of these decks include it.

05
Azami, Lady of Scrolls

Azami, Lady of Scrolls

47.8% of decks · synergy 0.35

Azami, Lady of Scrolls can tap Wizards to draw through the entire library, and Thassa's Oracle converts that natural card-draw loop into an immediate win the moment the deck is empty. Nearly 48% of Azami decks include it as the primary combo payoff.

Format Analysis

Where it lives, where it can’t

FormatVerdict
commander legal
legacy legal
modern legal
pioneer legal
standard not legal
vintage legal
pauper not legal
oathbreaker legal

Commander is where Thassa's Oracle does its defining work — the singleton format and slower pace make a two-card, instant-speed win condition dramatically harder to interact with than in 1v1 formats, and the card is a fixture in high-power and cEDH lists alike. In Legacy and Vintage, the Oracle combo sees niche play in dedicated Doomsday shells, where it serves as the payoff after resolving that sorcery. Modern and Pioneer support it as well, though the competitive infrastructure for a dedicated Oracle-combo deck is thinner in those formats and it rarely breaks into the mainstream metagame. Thassa's Oracle is not legal in Standard or Pauper, so its reach outside Commander is largely confined to eternal formats where the supporting cast exists.

Key Combos

Combo lines featuring this card

Budget Alternatives

Cheaper options that do most of the same work

There is no true budget replacement for Thassa's Oracle — the on-enter triggered ability that wins instantly with an empty library is unique to it. Laboratory Maniac and Jace, Wielder of Mysteries both require you to actually draw from an empty library rather than triggering on arrival, which means they die to removal before the win resolves and need an additional draw effect in the same turn; they're playable substitutes in lower-power builds but strictly worse against any meaningful interaction.

Price Context

Current price

$115.89 premium tier

At $115.89, Thassa's Oracle sits firmly in premium territory — one of the most expensive non-reserved-list creatures in Commander. It holds that price because it is the best at what it does with no functional reprint in a Standard-legal set, and demand from cEDH players is constant enough to keep the floor elevated.

Explore

Sources

Mentioned

← All cards

Updated . Data from Scryfall, EDHREC, and Commander Spellbook.