Chattering Seamimic

Chattering Seamimic enters the battlefield
with a +1/+1 counter on it for each leviathan
creature card in your graveyard.
Creatures you control have islandwalk.
As long as you control less than five islands,
Chattering Seamimic isn't a creature.
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Many elementals copy the from of the eradicated leviathans of Skydeep.