Mnemonic Deluge
Sorcery
Exile target instant or sorcery card from a graveyard. Copy that card three times. You may cast the copies without paying their mana costs. Exile Mnemonic Deluge.
- CMC
- 9
- Mana cost
- Color identity
- U
- Rarity
- mythic
- Set
- Commander Legends
- Price
- $7.76
- EDHREC rank
- #3838
Mnemonic Deluge copies a spell from any graveyard three times for six mana — that's a three-for-one on the most powerful instant or sorcery in the game state, and the exile clause barely matters when you're winning on the spot. Commanders like Hidetsugu and Kairi that care about the top card of the library or pile on extra spell triggers turn this into a game-ending haymaker, and even fringe combos like Biovisionary loops treat it as a reliable closer.
Best Commanders
Commanders with the highest synergy
Hidetsugu and Kairi
Hidetsugu and Kairi triggers on every spell cast, and casting Mnemonic Deluge three times in sequence off a single card generates three separate death triggers — each one digging into your library and threatening to cascade into even more damage or free spells.
Jeleva, Nephalia's Scourge
Jeleva, Nephalia's Scourge exiles spells from libraries and casts them for free, which means Mnemonic Deluge is exactly the kind of high-CMC instant or sorcery she's hoping to hit — and if she casts it herself, you're getting three copies of a spell you didn't pay a mana for.
Elminster
Elminster rewards you for scrying and casting instants and sorceries, and Mnemonic Deluge at six mana is a significant enough spell that the triple-cast trigger loads up his counters and threatens to end the game the turn it resolves.
Quandrix, the Proof
Quandrix, the Proof cares about casting multiple spells and copying them, and Mnemonic Deluge already casts the chosen spell three times — stacking Quandrix's doubling effects on top of that creates a multiplicative pile that most boards can't survive.
Neera, Wild Mage
Neera, Wild Mage randomly replaces spells you cast with free spells from your library, so running Mnemonic Deluge gives her decks both a legitimate top-end payoff and a high-CMC target worth hitting off a wild swing.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | not legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Commander is where Mnemonic Deluge lives — the singleton format guarantees every graveyard at a four-player table is stocked with juicy targets, and six mana is reachable in a midgame environment where someone has already resolved a Demonic Tutor or Cyclonic Rift worth copying three times. In Legacy and Vintage it's technically legal but practically irrelevant; six mana is a lifetime in those formats, and you'd rather just cast the original spell with a Snapcaster Mage. Oathbreaker can find a home for it in spell-heavy builds, though the 20-life clock shrinks the window. Mnemonic Deluge is a Commander card through and through — evaluate it only there.
Key Combos
Combo lines featuring this card
Budget Alternatives
Cheaper options that do most of the same work
Reverberate and Twincast copy a single spell for two mana each — nowhere near Mnemonic Deluge's three-copy output, but they're both under $1 and slot into any blue or red deck without a second thought. Increasing Vengeance ($1–2) is the closest functional analog, copying an instant or sorcery twice with flashback reuse, though it only targets your own spells and misses the grave-targeting flexibility that makes Mnemonic Deluge worth the premium.
Price Context
Current price
$7.76 mid tier
At $7.76, Mnemonic Deluge sits comfortably in the mid tier — expensive enough to feel like a deliberate inclusion, cheap enough that it's not a barrier for most Commander players. It's a niche card with a real ceiling on demand, so don't expect the price to move dramatically; buy it when you're ready to build around it, not as a long hold.
Explore
Sources
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.