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 Servitor observed commandeering a vehicle or mech of any kind.
 * Insurrection Prime is 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.
 * It pilots the first mech observed in the Destiny series.
 * Insurrection Prime is the first Fallen enemy in the Destiny franchise to not bear the ending -sis, -is, or -iks in its name, but instead being entitled as a title only.
 * Insurrection means a violent uprising against a higher power.
 * Insurrection Prime is the second Prime to appear without its Archon, the first being Brandaks Prime.

List of appearances

 * Destiny 2
 * Black Armory