Marvo, Deep Operative
Legendary Creature — Octopus Rogue
Whenever Marvo attacks, clash with defending player. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)
Whenever you win a clash, draw a card. Then you may cast a spell from your hand with mana value 8 or less without paying its mana cost.
- CMC
- 5
- Mana cost
- Color identity
- BU
- Rarity
- mythic
- Set
- Murders at Karlov Manor Commander
- Price
- $2.88
- EDHREC rank
- #7280
Marvo, Deep Operative flips the top card of your library face-up and lets you cast it for free when you attack with a Kraken, Leviathan, Octopus, or Serpent — effectively stapling a repeatable Temporal Trespass onto the combat step of the biggest creatures in the format. The ask is a five-mana 3/3 and a board state full of sea monsters, which makes it a near-automatic include in Runo Stromkirk and a luxury pickup everywhere else.
Best Commanders
Commanders with the highest synergy
Runo Stromkirk
Runo Stromkirk's whole game plan is flipping into Krothuss and attacking with a fleet of enormous sea monsters — exactly the trigger condition Marvo, Deep Operative needs to fire, turning every swinging Leviathan into a free spell off the top.
Yennett, Cryptic Sovereign
Yennett, Cryptic Sovereign already manipulates the top of the library to cheat out odd-CMC spells, and Marvo, Deep Operative layers directly onto that infrastructure — the face-up reveal turns Yennett's attacks into a two-for-one engine whenever you're running the Serpents and Krakens that fill a sea-monster package.
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 Marvo, Deep Operative lives and breathes — the format's singleton rule and multiplayer card-advantage arms race make a repeatable free-cast effect on a creature that slots into a tribal engine genuinely powerful. Outside Commander, Marvo is legal in Legacy and Vintage but sees no meaningful play there; the creature types it cares about don't map onto those formats' threat suites, and a five-mana 3/3 with no immediate board impact gets punished fast. Oathbreaker is the one alternative home worth mentioning — a sea-monster-focused build could make use of it, but the smaller deck size and tighter game length shrink the window to attack multiple times.
Key Combos
Combo lines featuring this card
Price Context
Current price
$2.88 cheap tier
At $2.88, Marvo, Deep Operative sits in the cheap tier — fair for a mythic-rare build-around with a narrow tribal requirement that keeps casual demand high but broad demand capped. It's unlikely to spike unless a new Kraken or Leviathan commander warps the format, so buying in now for a Runo deck is painless.
Explore
Sources
Mentioned
- Runo Stromkirk
- Yennett, Cryptic Sovereign
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.