A Dark Side power used by ancient Sith, this power allowed the user to call upon beings of other dimensions to aid them. The power was extremely dangerous, however, as one little flaw may backfire on the caster and instead suck them up into the vortex. For this reason, the power was rarely used. Darth Nihilus taught the power to Darth Voidious and Darth Erebus. Both were known to use it later without error.