The Crystal Eyes are mystical objects that imprisoned the Phantom Beast Generals. There are eight Crystal Eyes altogether in which five were found by Dr. Silva Jennings. Three which Jellica revives while the other five were given by Dr. Jennings to Casey to keep safe until the danger had passed. What became of these eyes is unknown.
As the Special Light hits the Crystal Eyes, the Phantom General's Rinzin Spirits starts to form their bodies.