Mark gets his blue suit in Invincible Season 3. It’s a major milestone for his character and the story, and it’s his “darkest ...

With the show adapting the comics fairly faithfully, Mark only gets the suit because his costume designer Art Rosenbaum got bored with it. The suit is first introduced in Invincible #51.

Additionally, it has remote piloting abilities, allowing Tony to fight in his Mark 72 armor while the Sentinel ... but the Model 51 suit, often called Model Prime, is the true utility knife ...