Wasilsi The Wasilsi were a sentient humanoid species that lived on the planet Joralla . They constructed temples and villages , worked metal , and had a written language . Joralla was inhabited by another sentient species , the avian Tikiarri , with whom the Wasilsi warred for many years . While the Wasilsi were stronger and more intelligent than their opponents , the humanoids eventually became extinct . A sentientologist from the University of Huvveck theorized that the Wasilsi were not native to Joralla and became extinct after contracting a plague . Biology and appearance . The Wasilsi were a species of humanoids ; that is , they had two arms and two legs . They had skeletons and were stronger and more intelligent than the avian Tikiarri , with whom they shared the planet Joralla for a time . Research by Beyorth Gommdora , a sentientologist , indicated that there was little similarity in structure between the Wasilsi and the Tikiarri , which led Gommdora to conjecture that the Wasilsi were not native to the planet and lacked natural immunity to bacteria or virus es , to which their avian counterparts were resistant . Society and culture . The Wasilsi were an intelligent species . They lived in villages , used gold and various other valuable metals , and created works of art and metal artifacts . They developed their own written language , which they recorded on parchment scrolls . The Wasilsi developed a religion , for which they constructed temples and statues of their religious figures . The architecture of at least one of their temples was octagonal , with sloping walls leading to a square apex . This was formed by four triangular sides and four rectangular sides . Various other features adorned the temple in a symmetrical design , including circular pillars . History . The Wasilsi lived on the planet Joralla , which was located in the Mid Rim ' s Mektrun sector . The Wasilsi built villages and temples on the temperate planet but came into conflict with the Tikiarri , a savage avian species . Over many years , the two species fought several great battles , which the Wasilsi memorialized through art painted on the walls of their structures . By the time of the Battle of Yavin , the Wasilsi were extinct ; all that remained were some artifacts and the crumbling ruins of their civilization , considered ancient by that time , buried or covered in undergrowth . The sentientologist Beyorth Gommdora , from the University of Huvveck , researched the Wasilsi , although his studies were hampered by violent encounters with Tikiarri tribes . Given the physical and intellectual superiority of the Wasilsi over the Tikiarri , it was considered highly improbable that the avians had eliminated the Wasilsi . Instead , Gommdora advanced a theory that the Wasilsi were not native to Joralla but had either established a colony on the planet or otherwise crashed there , and were subsequently wiped out by a plague , to which the Tikiarri were immune . During the Galactic Civil War , an independent freighter captain , Adriav Kavos , landed his vessel in the clearing next to a Wasilsi Temple while he attempted to trade a valuable Rebel Alliance data disk with a buyer . Kavos and his crew were subsequently attacked by Tikiarri . Behind the scenes . The Wasilsi were created in " Planets of the Galaxy , Volume One " , published by West End Games in 1991 . This material was reprinted in 1994 as part of " The Star Wars Planets Collection " .