Mithrandir, the Grey Pilrim

First Strike, vigilance, lifelink
{1}{w}, {t}, Sacrifice Mithrandir, the Grey Pilgrim:
Exile target creature with power 4 or greater.
Activate this ability only if Mithrandir, the Grey
Pilrim isn't reborn.
Rebirth 2 (When this creature dies, you may pay
{2}. If you do, return this creature to the battlefield
reborn with base power and toughness 4/4.