Loader

Whenever Loader deals damage to a creature
it gains +0/+2 and hexproof until the start of
your next upkeep.
{g}{r/w}: Loader fights up to one target creature.
{x}{g}{g}: Loader deals X damage to each creature without flying you don't control.
You may exert Loader as it attacks, when you do,
it gains +3/+0, trample, and flying until end of
turn.