Sealock Monster 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 Sealock Monster becomes monstrous, target land becomes an Island in addition to its other types.
Near Mint - £0.20
Lightly Played - £0.20
Moderately Played - £0.20
Heavily Played - £0.10
Damaged - £0.10
Near Mint Non English - £0.20
Lightly Played Non English - £0.20
Moderately Played Non English - £0.20
Heavily Played Non English - £0.10
Damaged Non English - £0.10