The trih xeem was a powerful weapon that was used to force a star undergo an early supernova. Originally created by the Jjaro, in the events of the Marathon Trilogy the Pfhor had captured a number of these weapons.
History
The trih xeem was used on at least three occasions; once against the Nakh – a "client" race of the Jjaro – and their rebellion six thousand years before the events of Marathon 2: Durandal; once against the Drinniol, in an undated slave rebellion;[1][2] and once on Lh'owon's sun in Marathon 2: Durandal.[2][3]
Marathon: Infinity
The trih xeem is a main plot point in Marathon Infinity as the Security Officer jumps timelines to prevent the Pfhor from releasing the dormant W'rkncacnter with the weapon.[2][4]