Graskar, Avatar of Grixis

Indestructible, Deathtouch, Lifelink
Graskar can't attack or block unless your devotion
to Grixis is less than 9. (each {u}, {b}, and {r} in the
mana cost of permanents you control counts
toward your devotion to Grixis.)
Whenever Graskar attacks, Add {u}{b}{r}, destroy 2 target permanents, each opponent discards 2
cards, loses 3 life, and exiles all the cards in their graveyards.
"None can escape death. From mortals to gods, they
must all eventually feel its cold embrace"