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Sealock Monster

thsTheros#62uncommon
{3}{U}{U}
Treatments
Foil
Market price · TCGplayer
updated 2026-06-22
Nonfoil$0.05
Low $0.01Mid $0.21Buylist
Foil$0.41
Low $0.15Mid $0.48Buylist
All finishes · 30d
updated 1h ago
Nonfoil$0.05 -16.7%
Foil$0.41 0.0%

All Printings

3 printings across 3 sets
Card details
Artist
Adam Paquette
Frame
2003
Language
EN
Border
black
Security stamp
Format legality
AlchemyNot legal
BrawlNot legal
CommanderLegal
DuelLegal
Future StandardNot legal
GladiatorNot legal
HistoricNot legal
LegacyLegal
ModernLegal
OathbreakerLegal
Old SchoolNot legal
PauperNot legal
Pauper CommanderNot legal
PennyLegal
PioneerLegal
PreDHNot legal
PremodernNot legal
StandardNot legal
Standard BrawlNot legal
TimelessNot legal
Tiny LeadersNot legal
VintageLegal
Oracle text

Creature — Octopus

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.

P/T5/5
Abilities
StaticThis creature can't attack unless defending player controls an Island.
Activated{5}{U}{U}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)
TriggeredWhen this creature becomes monstrous, target land becomes an Island in addition to its other types.
Flavor & art
Illustrated by
Adam Paquette
Rulings
  • WotCSep 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.

  • WotCSep 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.

  • WotCSep 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.

  • WotCSep 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}.”