Eyes of Etro

The Eyes of Etro is the name of the seeress' power to have visions in Final Fantasy XIII-2. Bestowed upon them by the goddess Etro, a seeress like Paddra Nsu-Yeul can have visions of any moment in the timeline at any random time. The Eyes of Etro has a strong connection to chaos, since the Unseen Realm of Valhalla is at the heart of every vision, and all of time can be seen from there. This 'gift' however, is also a curse, as it drains the life force of the seeress each time she has a vision, and if she has one strong enough, the serress will die.

Datalog
''The 'Eyes of Etro' is another name given to Yeul's power to see changes in the timeline. Not restricted to the past or future, Yeul can witness any period in history. This ability is associated with the power of chaos, and is thus seen as a blessing of the goddess. The fact that Serah shares this ability is a sign that she has come under the gaze of Etro at some point in the past.''

''Every time a seeress has a vision, a part of her life force is drained away. For this reason, all the Yeuls in history have died before their twentieth birthdays. The Eyes of Etro cannot be voluntarily closed, and most often when history undergoes a significant upheaval. Noel is afraid that every change they make during their journey is eating away a little more of Serah's life span.''