Superdimensional teleport gate
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In the Transformers universe, the Super-Dimensional Teleport Gate is a ship-sized device that crashed on the Planet Gaia during the Second Beast Wars. The gate is capable of reaching across space and time and retrieving any life form chosen.
It is unknown who designed the device, but it was apparently abandoned to crash into the planet. It was used by the Destrons (Decepticons), led by Galvatron, to return Meijin Zarak. Magnaboss used his energy to power the gate for one last transit - bringing Convoy to fight alongside LioConvoy.