The Parallax, also known as Kothriks-3, was a large Servitor of the House of Change able to project visions of itself across an entire planet, making it extremely difficult to track down and destroy the Servitor itself.

During the Battle for Callisto, the Parallax was fought several times, each time escaping to a new strategic location while the Guardians were left fighting its projections.

The Parallax fought alongside Azkyr, Kell of Change in the final battle aboard Changeship Kothriks-Sai, ultimately resulting in its destruction.