Agatha, Augur of Duskwing

Flying, Lifelink
Spells and other permanents you control have lifelink.
Whenever a source an opponent controls deals damage, that source's controller looses that much life.
The eldest sibling of Bruna, Gisela, and Sigarda was long ago destroyed by Avacyn, her fate a grim portent of Innistrad's destiny.