Seafloor Skirmisher

Dominion (When this creature enters the battlefield,
an unclaimed land you control becomes claimed by it
for as long as you control both of them.)
Whenever a land enters the battlefield under
your control, if it shares a name with a land
claimed by Seafloor Skirmisher, Seafloor
Skirmisher gains hexproof until end of turn and
can't be blocked this turn.