
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 has 3 printings, first in Theros (2013). EDHREC ranks it #23,217 among Commander cards. It appears most in Slinn Voda, the Rising Deep decks (41 on EDHREC). It has 4 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.