Trailian sithspawn
The Trailian sithspawn were a race of the Trailian species created by Emperor's Hand Cronal. Through genetic engineering and dark side experimentation, he transformed a massive number of the once-peaceful Trailians into exceptionally powerful warriors with extremely dangerous Force abilities, such as Force lightning. Despite their great power, they remained absolutely loyal to Cronal, who sent them on numerous missions to attack the neighboring worlds of Trailia. This race was eventually defeated by a group of offworld adventurers.
Behind the scenes
This group was described in The Monster Maker as "a twisted dark race of warriors." Although they were not identified as Sithspawn, their method of creation involved extensive "genetic engineering and Dark Side power", aligns with accounts describing the creation of other Sithspawn by Cronal/Blackhole.