Ocean's Hungry Grasp

Flash, lifelink
Ocean's Hungry Grasp's power is equal to the
number of Islands you control.
Whenever Ocean's Hungry Grasp deals combat
damage to a player or planeswalker you may pay {b}, if you do, creatures without flying the
defending player controls get -1/-1 for each
damage dealt this way.
Whenever a creature an opponent controls would
die target player loses 1 life and you gain 1 life.