Xuro, Roar of Death

Deathtouch
If Xuro, Roar of Death would die, tap it instead.
It doesn't untap during your next untap step.
When Xuro, Roar of Death attacks, you may
pay {b}{g} and sacrifice another creature. When
you do, Bear, Zombie, and Horror creatures you
control get +X/+0 and gain trample until end of
turn where X was the sacrificed creature's power.