Auvereen, The Seventh Tower

Party Member. Reach. Romantic.
Whenever an Elf, Angel, Cleric, Citizen or Dragonborn enters under your control, you gain life equal to that creature's toughness.
As long as you have at least X life more than
your starting life total, creatures you control...
• 7 or more life, get +2/+2.
• 14 or more life, have hexproof.
• 21 or more life, have indestructible.
(Based on Righteous Valkerie.)