Oh perfect. Just how I always thought.
Iban is quite a few notches less fearsome than he was in Runescape Classic to me when I was 9. I remember, at the time, the underground pass had come out and it was the hardest quest in the entire game by a margin.
The setup was scary to a kid. The quest is long as stuff so you have to do it pretty much all in one go. There is an escort who goes insane over time. There are "chants" printed in red at the corner of your screen saying stuff like, "Join us, join us, embrace the mystery!". You get into the main cavern and it's full of a unique zombie called the "soulless" that are the product of kidnapped people being stuck in cages for so long they go insane. Upstairs there are cages with people in them called "Half-Soulless" and they bite at you if you try to help them. Iban himself would cast spells that would do more single-hit damage than anything else, and Iban's Staff let you cast Iban Blast, which was the most difficult spell to use and the most powerful one at that. You don't even fight Iban directly, you have to painstakingly construct a voodoo doll and throw that into a well full of fire instead.
So when I was a little kid I was like, ye. That's me.