The lagartoz war dragons(also known as basiliskans) where an intelligent reptilian species that lived on the planet basilisk.They where the builders of the basilisk war droids which where modeled after themselves. When the mandalorians invaded basilisk the basiliskans poisoned their own planet as a last attempt to stop the mandalorians,it didn't. After the battle the mandalorians found a new use for the basiliskans and renaimed them the lagartoz war dragons and used them as battle mounts because of their thick hides and sharp claws not to mention the ease in training them. Shortly after this the basiliskans went insane and are now little more than savage beasts.