Thassa's Oracle
Thassa's Oracle: Creature - Merfolk Wizard, Theros Beyond Death. MTG card printings, market prices, rulings, and format legality on Mana Grove.
- Mana cost
- {U}{U}
- Mana value
- 2
- Type
- Creature - Merfolk Wizard
- Colour identity
- Blue (U)
- Power / toughness
- 1/3
- Rarity
- Rare
- Set
- Theros Beyond Death (THB)
- Released
- 2020-01-24
- Collector number
- 73
- Artist
- Jesper Ejsing
Build around this card with Grover
About Thassa's Oracle
Thassa's Oracle is a Magic: The Gathering card, a rare blue creature from Theros Beyond Death (THB), an expansion set released in January 2020. It is collector number 73 in that set, with art by Jesper Ejsing. It costs {U}{U} (two blue mana) to cast, for a mana value of 2. It is a 1/3 creature. Its colour identity is blue. It is legal in Pioneer, Modern, Legacy, Vintage, Commander, Oathbreaker, Brawl, Timeless and Gladiator. It is banned in Duel Commander and Historic. It has been printed in 5 sets, from Theros Beyond Death (2020) to Mystery Booster 2 (2024). The latest aggregated market price for this printing is $20.33 (normal finish, as of 2026-10-23).
Card text
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.)
Market price
Latest aggregated market price for the normal finish of this printing: $20.33 (as of 2026-10-23).
The figure covers this printing only; other printings carry their own price on their own page.
Format legality
Legality of Thassa's Oracle by format. Formats in which it is not legal are not listed.
| Pioneer | Legal |
|---|---|
| Modern | Legal |
| Legacy | Legal |
| Vintage | Legal |
| Commander | Legal |
| Duel Commander | Banned |
| Oathbreaker | Legal |
| Brawl | Legal |
| Historic | Banned |
| Timeless | Legal |
| Gladiator | Legal |
Other printings of Thassa's Oracle
Thassa's Oracle has been printed in 5 sets. The other printings are listed newest first, with the rarity and release year of each.
| Printing | Rarity | Year |
|---|---|---|
| Mystery Booster 2 (MB2) #175 | Rare | 2024 |
| Secret Lair Drop (SLD) #1280 | Rare | 2023 |
| Magic Online Promos (PRM) #79909 | Rare | 2020 |
| Theros Beyond Death Promos (PTHB) #73p | Rare | 2020 |
| Theros Beyond Death Promos (PTHB) #73s | Rare | 2020 |
| Theros Beyond Death (THB) #308 | Rare | 2020 |
Official rulings
Six official rulings apply to Thassa's Oracle, newest first.
- 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.
- 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.
- 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.
- 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.
- Hybrid mana symbols, monocolored hybrid mana symbols, and Phyrexian mana symbols do count toward your devotion to their color(s).
- Mana symbols in the text boxes of permanents you control don't count toward your devotion to any color.
Similar cards
Other creature cards with a blue colour identity, ranked by how often they appear in Commander decks.