Negassi, the Mad Sea Deity

Trample
Negassi, the Mad Sea Deity's power and
toughness are each equal to the number of
islands on the battlefield.
At the beginning of each player's end step, that
player puts a flood counter on a land they
control without a flood counter on it, unless that
player pays {3}. That land is an island in addition
to it's other types.