Sephiroth, One-Winged Angel

Flying, Vigilance, Double Strike, Indestructible
When this creature transforms create a colorless
artifact token named Meteor with 5 calamity
counters on it, and {t}Remove a calamity counter,
then if there are no calamity counters on this
artifact, Destroy All Permanents.
"Only death awaits you all, but do not fear. For it is
through death that a new spirit energy is born. Soon,
you will live again as a part of me." - Sephiroth