Urshak, Demontame Hunter

Great Soul- This card costs {b} less to cast if an opponent controls a legendary creature.
Reach, skulk, deathtouch
Whenever a creature an opponent controls dies,
create a 1/1 black and white Spirit creature token
with flying.
When all creatures you control die, you lose the
game, this ability lasts after Urshak, Demontame Hunter leaves the battlefield.