Xack, Brine & Claw Naturalist

Ward {x}, where X is the number of islands
you control
Whenever this creature mutates, return target
noncreature card with mana value X or less
from your graveyard to your hand, where X is
the number of times this creature has mutated.
{1}{r}, {t}, Discard a card: Xack deals 3 damage
to any target