|First appearance||The Amazing Spider-Man #329 (February 1990)|
|Created by||Erik Larsen
The Tri-Sentinel's first appearance was in The Amazing Spider-Man #329, which followed on directly from the Acts of Vengeance storyline. In that storyline, several superheroes including Spider-Man, Captain America, Thor, Iron Man, and Cloak and Dagger came together to fight the Asgardian trickster god Loki. After Loki's defeat at the hands of Thor, Loki engaged in a final act of vengeance by creating the Tri-Sentinel by merging three Sentinels that belonged to Sebastian Shaw. The Tri-Sentinel was sent by Loki to attack a nuclear power plant and thereby destroy New York City. It was defeated by Spider-Man, who at that time possessed the powers of the Captain Universe entity.
In a subsequent Spider-Man storyline, the villainous Life Foundation gathered the remains of the Tri-Sentinel and rebuilt it to serve them and provide security for their clients. When Carlton Drake turned it on, it rejected the Life Foundation's directives and reinstated Loki's. Spider-Man and Nova undertook to defeat the Tri-Sentinel. Nova used an aircraft-mounted magnetic cannon to slow it down, while Spider-Man penetrated to the inside of the Tri-Sentinel's armour, fought its automated internal defence systems, and opened a vibranium container at the Tri-Sentinel's core, causing the Tri-Sentinel to melt before reaching a heavily populated area.
The Hellfire Brats later began producing their own line of Tri-Sentinels, advertised with the pitch, "The Mark VIII. Our take on the Tri-Sentinel. A walking slaughterhouse, powered by its own miniature nuclear reactor. When nothing less than genocide will do."
Powers and abilities
Tri-Sentinel's strength level is at Class 100 and it can fly. It can shoot bolts from its eyes, shoot tear gas from its hands, create energy fields to protect its interior and exterior, fire tentacles from its palms, and regenerate. Tri-Sentinel can override technological backup self-destruct devices. In the event that someone goes inside the Tri-Sentinel, it can use its internal components as projectiles.
- The Amazing Spider-Man #329
- David Michelinie (w), Mark Bagley (p), Randy Emberlin (i), Bob Sharen (col), Rick Parker (let), Danny Fingeroth (ed). "The Three Faces of Evil!" The Amazing Spider-Man #351 (September 1991), United States: Marvel Comics
- David Michelinie (w), Mark Bagley (p), S. Delarosa (i), Bob Sharen (col), Rick Parker (let), Danny Fingeroth (ed). "Death Walk!" The Amazing Spider-Man #352 (October 1991), United States: Marvel Comics
- Jason Aaron (w), Chris Bachalo (p), Tim Townsend, Jaime Mendoza, and Al Vey (i), Chris Bachalo (col), Chris Eliopoulos (let), Nick Lowe (ed). "The Fires of Hell A-Glowing" Wolverine and the X-Men #16 (12 September 2012), United States: Marvel Comics
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