sentences:  He further instructs him to destroy Vanitas, the source of the Unversed, who was created from the darkness extracted from Ventus's heart.Shortly afterward, the three friends reunite at Radiant Garden, but a schism forms between them when they have an argument over Terra's presumed actions in the other worlds.Ventus encounters Xehanort, who reveals his intention to recombine Ventus and Vanitas's hearts to create an all-powerful Keyblade called the χ-blade.