Unworld Harnesses are, obviously, Harnesses that are not of worldly creation and are believed to have either manifested on their own or by a higher being--Exorsus , specifically. Unworld Harnesses are extremely hard to come by and even lesser known. A Harnesser cannot wield more than one element from the Unworld class and if a Harnesser happens to control an Unworld element , they are unable to have any others. Inheritance is impossible to perform with Unworld Harnesses, as all that have tried have died in the process, both the givers and the receivers.

The elements classified in Unworld are space, time, gravity, and undead.