Squall Leonheart

First strike
When Squall attacks, exile cards from the top of
your library until you exile a nonland card. If
that card's converted mana cost is greater than
Squall's power, it gains +X/+0 until end of turn,
where X is that card's converted mana cost.
Repeat this action until you exile a nonland card
with converted mana cost less than or equal to
Squall's power. Then put all cards exiled this way
on the bottom of your library in a random order.