Avacyn Reborn

Flying, Indestructible, Ward {2}
Whenever a permanent you control is sent to the graveyard, Avacyn Reborn deals damage equal
to the mana value of the permanent to target
opponent. That opponent may sacrifice a
permanent of equal or greater mana value to
prevent the damage.
The creature bearing the name Avacyn is not the
same as from before, Only her visage remains.