Eidolon is a measure of spiritual fortitude. It is useful against a wraith's shadow.
Once per session, each point of Eidolon grants a wraith one extra die to add to any roll which rests some intent, plan, or ploy of her shadow. 1 - You can sometimes second-guess your shadow.2 - There are days when you are firmly in control.3 - Spiritually tough; your shadow must work hard to influence you.4 - You see through all your shadow's ploys.5 - Your shadow must choose its moment carefully or waste all its efforts.
Wraith or Risen