Ex, All That is Left

Ex, All That is Left's power and toughness are
each equal to X. When Ex, All That is Left dies
without being sacrificed, exile it. Then each
opponent either takes X damage or sacrifices X
creatures. All creatures sacrificed this way go into
exile instead.
"Be careful what you wish for. If I die, there's no
going back, and you won't like it when you kill a God."
- Ex