Seshiok the Condemner

Vigilance, Lifelink
Whenever Seshiok attacks for the first time each
turn, untap all other creatures you control and
after this phase, there is an additional combat
phase.
Whenever another creature dies, you may exile
it. If you do, put a +1/+1 counter on Seshiok and
you may gain 1 life.
"One day, there may be a day so dark that you
will call upon my power. And I swear to you,
on that day, I will heed that call."