Rebirth of Tel'Ovar

Whenever a creature you control dies, put a
restoration counter on Rebirth of Tel'Ovar.
Then if there are eight or more restoration
counters on it, sacrifice it and create Tel'Ovar, a
legendary 4/4 black Horror creature token with
trample, indestructible and "Whenever this
creature deals combat damage to a player, that
player sacrifices a creature".