Tri-Sentinels (Theta Sentinels)

Future Antagonists: Theta Sentinels serve as a primary enemy force in the Year 100 timeline (
), hunting down the remaining X-Men and mutant resistance.
Design: They are distinct for having three heads on a single, lanky body. In the comics, they are shown with telescoping necks and distended fingers.
Advanced AI: These models represent a later generation of the self-sustained Sentinel Program, far more powerful than the original Sentinels.
Brief Appearance: Despite their striking design, they have relatively little screen time, appearing in only a few panels before being destroyed during the final assault on the Orchis Forge.