Transdimensional accelerator
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The transdimensional exalurator is a machine.
It bended one dimension over another dimension and created a portal through time and space.(WC: Alien File: Erasmus Darkening) Erasmus Darkening used such a transdimensional exalurator. He was working on the machine in his secret chamber at Ashen Hill Manor. (TV: The Eternity Trap)