Maro, Breeze Rider

Maro, Breeze Rider is unblockable.
Whenever a player plays a land, put a +1/+1
counter onto Maro and it becomes indestructible
until end of turn.
{2}{u}{u}{r}{r}, {t}: Draw a card for each +1/+1
counter on Maro, then deal that much damage
to any target.