Usunaar, Wolf Rider

Player, trample
As long as you control a wolf, creatures you control get +2/+2 and Usunaar has defender.
At the end of combat, if Usunaar attacked this turn, put 2 -1/-1 counters on him. Create a 2/2 Wolf creature token.
Sacrifice a wolf: Add {g} to your mana pool.
Mana pool-{g}