Tsutsaroth
Elder Demons are a type of Demons that were used during the God Wars by Zamorak forces. It is unknown whether it is a rank amongst the demon army or a subspecies of Demon. One thing is sure, however: they are far stronger and deadlier than normal demons. The last known and confirmed Elder Demon was Thammaron, an Elder Demon that Zamorak directed to destroy the city of Uzer. Despite Uzer being destroyed, Thammaron was badly wounded by the Elite Golem army and eventually died of its wounds.