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.
Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") Flashback {2}{R} (You may cast this car...
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Search your library for a land card, reveal it, and put it into your hand. Then shuffle your library.
Until your next turn, all lands you control become 2/2 Elemental creatures with reach, indestructible, and haste. They're still lands.
Green creatures you control get +1/+1. Whenever a green creature enters the battlefield under your control, scry 1.
Exile target creature. Its controller gains life equal to its power.
