Insurrection Prime, Kell's Scourge

Insurrection Prime, Kell's Scourge is a Prime Servitor rebuilt into an immense war machine by the Kell's Scourge, and the final boss of the Scourge of the Past Raid.

Breaching the City
At some point, the Kell's Scourge stole technology from the Black Armory and kitbashed it along with their own technology, in order to create a massive war-mech for Insurrection Prime to commandeer.

Black Armory
Insurrection Prime and the Kell's Scourge breached various different Black Armory vaults and succeeded in stealing technology and weapons, helping outfit Kell's Scourge militants to have superior combat capabilities. After losing the Forge on Nessus, the Kell's Scourge launched an invasion the Last City using Insurrection Prime's mech to breach their defenses and occupied a desolate section of the city, with the intent of plundering the vault within. In response, the Vanguard dispatched a fireteam to raid the Scourge territory and destroy the war machine.

Traits
Insurrection Prime is an aggressive, terrifying Prime Servitor, reigning through its massive war machine. With the mech by its side, it is the most powerful Servitor ever encountered by Guardian forces, requiring a team of six to bring its mech down. It seeks to bring down traditional Fallen ideals, and establish a new age of anarchy amongst their species by bringing down terror and hellfire through its mech. It is one of the most powerful Fallen combatants ever encountered by Guardians, only rivaling the likes of Aksis, Archon Prime in its combat capabilities.

Trivia

 * The mech bears an incredible resemblance to Metal Gear Rex of the Metal Gear Solid series, suggesting possible inspiration taken in its design.
 * Insurrection Prime's mech also resembles the Tone Titan from Titanfall 2.
 * It is the first mech seen in the 'Destiny' franchise and the first Servitor observed commandeering a vehicle or mech of any kind.
 * It is also the first Servitor to be a Raid boss in the Destiny series.
 * Parts from various different Fallen technologies can be seen throughout the mech, with its head plate being taken from a Spider Tank.
 * Insurrection means a violent uprising against authority, essentially rising against the traditional ways of the Fallen and is one of the few Fallen to not bear a traditional name ending -sis, -is, or -iks in its name. Showing greater abandonment of tradition.

List of appearances

 * Destiny 2
 * Black Armory