Mnemonic Betrayal
Mnemonic Betrayal: Sorcery, Guilds of Ravnica. Exile all opponents' graveyards. MTG card printings, market prices, rulings, and format legality on Mana Grove.
- Mana cost
- {1}{U}{B}
- Mana value
- 3
- Type
- Sorcery
- Colour identity
- Blue and black (UB)
- Rarity
- Mythic
- Set
- Guilds of Ravnica (GRN)
- Released
- 2018-10-05
- Collector number
- 189
- Artist
- Clint Cearley
Build around this card with Grover
About Mnemonic Betrayal
Mnemonic Betrayal is a Magic: The Gathering card, a mythic rare blue and black sorcery from Guilds of Ravnica (GRN), an expansion set released in October 2018. It is collector number 189 in that set, with art by Clint Cearley. It costs {1}{U}{B} (one generic, one blue and one black mana) to cast, for a mana value of 3. Its colour identity is blue and black. It is legal in Pioneer, Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker, Brawl, Historic, Timeless, Gladiator and Penny Dreadful. Guilds of Ravnica is its only printing so far. The latest aggregated market price for this printing is $6.41 (normal finish, as of 2026-10-23).
Card text
Exile all opponents' graveyards. You may cast spells from among those cards this turn, and mana of any type can be spent to cast them. At the beginning of the next end step, if any of those cards remain exiled, return them to their owners' graveyards.
Exile Mnemonic Betrayal.
Market price
Latest aggregated market price for the normal finish of this printing: $6.41 (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 Mnemonic Betrayal by format. Formats in which it is not legal are not listed.
| Pioneer | Legal |
|---|---|
| Modern | Legal |
| Legacy | Legal |
| Vintage | Legal |
| Commander | Legal |
| Duel Commander | Legal |
| Oathbreaker | Legal |
| Brawl | Legal |
| Historic | Legal |
| Timeless | Legal |
| Gladiator | Legal |
| Penny Dreadful | Legal |
Official rulings
Five official rulings apply to Mnemonic Betrayal, newest first.
- Mnemonic Betrayal doesn’t change when you can cast the exiled cards. For example, if you exile a sorcery card, you can cast it only during your main phase when the stack is empty.
- You can’t play land cards exiled this way.
- Only the cards that remain in exile are returned to their owners’ graveyards. For example, a permanent spell cast this way will remain on the battlefield.
- In a multiplayer game, if a player leaves the game, all cards that player owns leave as well. If you leave the game, any spells or permanents you control from Mnemonic Betrayal’s effect are exiled. If you leave the game before Mnemonic Betrayal’s delayed triggered ability resolves, the cards remain exiled.
- If you cast a spell this way and that card is exiled, it’s considered a new object. Mnemonic Betrayal no longer allows you to cast it. It remains in exile when Mnemonic Betrayal’s delayed triggered ability resolves.
Similar cards
Other sorcery cards with a blue and black colour identity, ranked by how often they appear in Commander decks.