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Sealock Monster
CREATURE — OCTOPUS Uncommon
Theros EDHREC #22,847
$0.09
+0.0%
7 days
Price history
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Sealock Monster price history chart, default range 3 months. currently $0.09.
Sealock Monster Price Summary
Sealock Monster's current headline price is $0.09.
Sealock Monster Printings & Prices
3 printings
Sealock Monster has 3 tracked printings across 3 sets, in nonfoil and foil finishes.
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Sell Sealock Monster: Buylist Offers
4 offers
| Buyer | Printing | Finish | Cash offer | Retail | Spread |
|---|---|---|---|---|---|
| Card Kingdom | THS #62 | Foil | — | — | — |
| Card Kingdom | THS #62 | Nonfoil | — | — | — |
| Card Kingdom | DDO #42 | Nonfoil | — | — | — |
| Card Kingdom | PLST #DDO-42 | Nonfoil | — | — | — |
Sealock Monster Rules Text & Legality
View on Scryfall ↗This creature can't attack unless defending player controls an Island.
{5}{U}{U}: 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.
Sealock Monster is legal in Pioneer, Modern, Legacy and Commander, and not legal in Standard and Pauper.
standard
Not legal
pioneer
Legal
modern
Legal
legacy
Legal
commander
Legal
pauper
Not legal
Sealock Monster Rulings
4 most recent
- Sep 15, 2013 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.
- Sep 15, 2013 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.
- Sep 15, 2013 Once a creature becomes monstrous, it can't become monstrous again. If the creature is already monstrous when the monstrosity ability resolves, nothing happens.
- Sep 15, 2013 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 “{T}: Add {U}.”
Reprints & Reprint Risk
4 printings
Sealock Monster has been reprinted 4 times.
| Set | Date | Rarity | Treatment |
|---|---|---|---|
| PLST #DDO-42 | 2022-04-29 | Uncommon | Standard |
| DDO #42 | 2015-02-27 | Uncommon | Standard |
| THS #62 | 2013-09-27 | Uncommon | Standard |
| THS #62 | 2013-09-27 | Uncommon | Standard |
PLST #DDO-42 
DDO #42 Sealock Monster in Commander
Sealock Monster is the #22,847 most-played card on EDHREC, down 409 places over the last 30 days.
Sealock Monster FAQ
How much is Sealock Monster worth?
Sealock Monster is worth about $0.09 for its cheapest playable printing as of Sep 23, 2026.
Is Sealock Monster legal in Commander?
Yes — Sealock Monster is legal in Commander. It is also legal in Pioneer, Modern and Legacy.
Has Sealock Monster been reprinted?
Yes — Sealock Monster has been reprinted 4 times, with 3 printings tracked on The Index.
Why is Sealock Monster cheap?
Sealock Monster trades at about $0.09 — 4 reprints keep supply plentiful, and Commander demand is modest (#22,847 on EDHREC).