Form of the Endless Turns

At the beginning of your upkeep, if you have 5 or less life, sacrifice this enchantment and take an extra turn after this one.

, : Return target artifact or enchantment card from your graveyard to your hand.

At the beginning of your upkeep, this enchantment deals 5 damage to any target. At the beginning of each end step, your life total becomes 5. Creatures without flying can't attack you.