Star Wars Episode XV - Ravages Of Time
Rancor is the only self-aware, sentient, and force using kind of his species. A long time ago he was given powers by the Ancients in order to guard time and the general flow of the universe.
Seeing an end to all things by the Fulminar menace and aided by Qui-Gonn’Jinn and Daskar’Jinn, he broke free of his confines and aided in the final battle on Ithor. He has appeared as a force spirit even while being alive, and seems to have control over powers that none can quite grasp.
At the end of the war, as a gesture of friendship, he hosted a timewide tournament, allowing participants from all of time to come and fight against each other.
Rancor has shown up to every reunion on The Unnamed Station, though his presence tends to unnerve many of the guests.