Executioner Av'aar the Blazing

Have found a Demon by the name of Exectutoner Av'aar the Blazing, lvl 200, strolling round just North of West Ardougne, below the Tree Gnome Stronghold. Has also been reported in Tirrawn forest, has since despawned in both places. He is non-agressive, add in more here is you find anything that can help us. Currently hunting for him again. Please help us crack this one. HE IS ATTACKABLE, has  high melee attack, but also has a lower hitting magic attack that hits several times over several seconds.

Thanks, Dr Cruel