Scourge

Feared as Scourge the Insignia seizer, Scourge is an ancient bot who's believed to lived during the age of Wraith and is still believed to live to this day. Even Megatron fears this mysterious bot, and he was a fearsome gladiator!

But what dose this mythical bot do even? Well your friend will tell you that he wanders the wilderness of Cybertron, and if you seem the perfect prize he will murder you brutally and take your faction Insignia as a prize, even putting his best prizes on his alt-mode's grill.

Scourge is the only member of his own faction, as he is a loner.

History:

Scourge was forged during the days of Quintesson rule in the cybertronian wilderness, he used to live in a village, but that village was destroyed by Galvawar and he escaped into the wilderness and became a feared warrior who would kill the biggest targets and take their insignia as their prise.

Scourge first got involved in the cybertronian revolt just before the attack of Lacon by saving a young Shockblast, he met Alpha prime who convinced him to help his cause and was assigned to kill Gnaw, somebody he wanted to take his Insignia for a very long time.

During the battle he found Gnawn and found out he was cybertronian before killing him and adding his Insignia to his collection before leaving the palace.[Quintesson Revolt 1 of 3]

Throughout the Quintesson war he supported the Alpha Vanguard to the end but never joined the faction. He was assigned by Nova prime with Galvawar and Cyclonus to awaken Trypticon and he used the Titan to destroy a Quintesson army[Quintesson Revolt 2 of 3] 

He was present in the last battle where he hunted down and killed the Quintesson Deseeus, before leaving society after the revolt was over[Quintesson Revolt 3 of 3]During the Guardian era he mostly stayed out of sight, kept on living in the wilderness.

During the Guardian-Malignus war he hunted down many strong bots on both sides and was a problem for everyone. When the Autobots came to power they tried to capture Scourge but to no avail.

During the great war he killed the Decepticon psychologist Venom during a hike in the wilderness[Family reunion] and some unnamed Autobots and Decepticons, as well as some Predacons and Maximals.

Notes:

He's based on the ROTB Scourge