Evrae Altana, Corrupted Aeon

When an Eidolon dies, Evrae Altana, Corrupted
Aeon in your hand gains flash until end of turn.
When Evrae Altana deals combat damage to a
player, they get a zombie counter. If a creature
was dealt damage instead, it petrifies. (Flip it face
down. It becomes a new colorless 0/1 Statue creature
with defender.)
Sources that cause opponents with a zombie
counter to gain life, instead cause them to lose
that much life.