Sithhud, the Frozen Lord

Frosttouch(Whenever this creature deals damage to a creature, tap that creature. It doesn't untap during its controller's next untap step.)
Whenever Sithhud, the Frozen Lord blocks, Fossilize(If target attacking creature was destroyed, you may create a 2/2 black zombie with deathtouch.)

Hell froze over and HE comes for thee.