Bane Back Spiders were large spiders native to various regions of the planet Dathomir. They were able to project their poisonous saliva to ward off threats. Shortly before 14 BBY, the spiders had become domesticated by the Nightbrothers, a group of warriors who were managed and led by the Nightsister clan of Dathomirian witches. During his secret mission to rebuild the Jedi Order in 14 BBY, the Jedi Padawan Cal Kestis encountered several bane back spiders on Dathomir.