Eladara, the Hidden

Eladara, the Hidden is not a creature unless it hasan umbra on her. Eladara, the Hidden cannot be targeted by any spells or abilities other than umbras. Eladara, the Hidden is the same type as the umbra on her.
Whenever an umbra attached to Ealadara, the Hidden leaves the battlefield put an umbral counter on her. If, at any time, Eladara, the Hidden has 3 or more umbral counters on exile it and then return her to the battlefield transformed under her owner's control.