Reversionist

The Reversionists are a faction on Cybertron, noted, and largely hated, for their piousnesses. They believe that Cybertron was once Primus, and so that every Cybertronian is in a small way Primus himself, and therefore that deceased Cybertronians ought to be cremated in a plasma pyre to return their substance to Cybertron, hence the name.

They seem to have a penchant for staffs and are known to revere the Titans.

Fiction

2019 IDW continuity

Though Bumblebee considered them to be one of the smaller factions on Cybertron, The World In Your Eyes Part Two the Reversionists had enough of a presence that their leader, Heretech, held a seat on the inner Senate. The Cracks Beneath Your Feet Part Four Despite this, the Reversionists were largely disliked as a faction. When Brainstorm was murdered, the Reversionists petitioned Orion Pax to allow one of their number to speak at his funeral and for them to be present at the birth of a new Cybertronian. Though unsympathetic to them, Orion made the compromise, mainly so that the Reversionists would not join the Ascenticons.

When the newborn was forged, the Reversionists stood among the crowd outside the Pyramid, praising Primus. While Rubble could see their viewpoint, Bumblebee scoffed that everything was mystical to a Reversionist. At Brainstorm's funeral, Ironhide noted that the deceased would be appalled to learn a Reversionist was speaking reiterating the late scientist's opining that the lot of them ought to be shipped off to the most remote colony. The World In Your Eyes Part Four

At the last Senate meeting before Sentinel Prime returned home, Heretech spoke for his faction, though Megatron felt what he had to say was annoyingly repetitive and outdated. The Cracks Beneath Your Feet Part Four Following the Prime's return to Cybertron, Prowl informed him of a Reversionist protest at the Tether that was pushing for a unity government. The Change In Your Nature Part One