Becoming a Terrorcon
You can play as a Terrorcon too. If you die as Cliffjumper with Dark Energon in your system, you come back as Terrorcon Cliffjumper. Or you can just pick him with /transformer setself cliffjumper terrorcon.
His own page has everything about how he plays: Terrorcon Cliffjumper.
While you’re a Terrorcon, wild Terrorcons see you as one of them and won’t attack you unless you hit them first.
Gamerules
Section titled “Gamerules”keepTerrorconOnRespawn: players who were Terrorcons stay Terrorcons after dying and respawning. Off by default. Leaving the End through the exit portal never counts as dying.morphTeams: morphing puts you on your character’s team, so a Terrorcon goes on the Terrorcons team. On by default.