Sui Generis Umbra (ex-Umbra) - is a polish dark electro (with elements of ritual and dark ambient) project, founded by eLL and Maciej Niedzielski in 1999.

They have got three releases - "Possum Play Falcon" (split with Ildfrost), "Coma" and "Amok". There is also a videoclip, called "Comayhem".

Lyrical themes are about death, occultism, vampirism, transcendental experience.

There have been several live shows in the past, but according to the band's statement, unfortunately there will be no more.