Lucien in his skeleton form. Taken from the RS wiki.
Lucien is the antagonist from whom you must retrieve the Stone of Jas and Staff of Armadyl in order to defeat Jas.
Because Lucien has been in possession of the Stone of Jas for so long after he took it, he is more powerful than Zamorak, the god he succeeded.
Trivia[]
Before he died in SSFCYOAIII, Lucien said
"No... Lord... Jas..."