Sealock Monster
Creature — Octopus
THSTheros#62uncommon
- Finishes
- Nonfoil · Foil
- Border
- black
- Frame
- 2003
- Pull rate
- about 2 per booster–1 in 1067
- Illustrator
- Adam Paquette
- Found in
- Theros Intro Pack Manipulative Monstrosities · Journey Into Nyx Intro Pack The Wilds and the Deep · 4 more
CommanderLegalModernLegalStandardNot legal
Format legality
Constructed
StandardNot legal
PioneerLegal
ModernLegal
LegacyLegal
VintageLegal
PauperNot legal
Commander
CommanderLegal
Pauper CommanderNot legal
Duel CommanderLegal
PreDHNot legal
OathbreakerLegal
Tiny LeadersNot legal
Arena
AlchemyNot legal
HistoricNot legal
TimelessNot legal
BrawlNot legal
Standard BrawlNot legal
Competitive BrawlNot legal
GladiatorNot legal
Other
PremodernNot legal
Old SchoolNot legal
Penny DreadfulLegal
Future StandardNot legal
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: 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.Market · per finishspark updated 1h ago · prices as of 2026-08-30
TCGplayerFinish
Market
Δ 30D · Trend
Low
Buylist
Buy / Sell Gap
Buy
Nonfoil
$0.09
+50.0%
Since Feb 2024:H $0.11L $0.03$0.01
$0.01
$0.000% · normal spread
VenuesHide venues
Low: tcgplayer
Buylist: cardkingdom
Foil
$0.41
0.0%
Since Feb 2024:H $0.49L $0.14$0.15
$0.08
$0.07+47% · normal spread
VenuesHide venues
Low: tcgplayer
Buylist: cardkingdom
Cheapest playable copy$0.09· across 3 printings· you're viewing it
Rulings
4 · latest Sep 15, 2013
- 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 “
: Add .”