Logain, Sealbreaker

When Logain enters the battlefield, look at the top
six cards of your library. You may put a creature
card with mana value less than or equal to Logain's
power from among them onto the battlefield. Put
the rest on the bottom of your library in a random
order.
Restored X - You may cast Logain from your
graveyard by exiling an artifact with mana value X
from your graveyard in addition to his other costs.
When you do, he enters with X +1/+1 counters on
him.