Sealock Monster
~$0.10 low · ~$0.41 high
Blue. Creature — Octopus
Duel Decks: Elspeth vs. Kiora #42 · Illustrated by Adam Paquette
Duel Decks: Elspeth vs. Kiora #42 · Illustrated by Adam PaquetteWhat is Sealock Monster worth?
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TCGplayer market prices in USD, updated October 14, 2026. Each price is for one printing and one finish.
Oracle text
This creature can't attack unless defending player controls an Island.
: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)
When this creature becomes monstrous, target land becomes an Island in addition to its other types.
5/5
Format legality
All 3 printings of Sealock Monster
| Printing | Rarity | Non-foil | Foil | Cardmarket (EUR) |
|---|---|---|---|---|
 The List plst #DDO-42· 2019uncommon· Cardmarket €0.18 | uncommon | $0.28 | No foil printing | €0.18 |
 Duel Decks: Elspeth vs. Kiora ddo #42· 2015uncommon· Cardmarket €0.06 | uncommon | $0.10 | No foil printing | €0.06 |
 Theros ths #62· 2013uncommon· Cardmarket €0.04 · €0.34 foil | uncommon | $0.10 | $0.41 | €0.04€0.34 foil |
Prices are TCGplayer market prices in USD for each printing and finish, via Scryfall. They are a guide, not an appraisal.
Where to buy Sealock Monster
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Card details
- First printed
- 2013
- Printings
- 3
- Mana value
- 5
- EDHREC rank
- #23,081 on EDHREC (Commander popularity)
- Keywords
- Monstrosity
- Artist
- Adam Paquette
Rulings (4)
2013-09-15
The effect making the land an Island doesn't have a duration and will last indefinitely. The land retains any land types and abilities it already had. An Island has the ability “
: Add .”2013-09-15
Monstrous isn't an ability that a creature has. It's just something true about that creature. If the creature stops being a creature or loses its abilities, it will continue to be monstrous.
2013-09-15
An ability that triggers when a creature becomes monstrous won't trigger if that creature isn't on the battlefield when its monstrosity ability resolves.
2013-09-15
Once a creature becomes monstrous, it can't become monstrous again. If the creature is already monstrous when the monstrosity ability resolves, nothing happens.
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