Phera, Sin of Envy

As long as you have 50 or more cards in your
library, Phera, Sin of Envy isn't a creature.
When Phera, Sin of Envy enters the battlefield,
you may have each opponents life total become
equal to your life total.
at the beginning of your upkeep if Phera, Sin
of Envy is a creature, you may exchange life
totals with target player.