Underground Pass/Quick guide

Starting out

 * Talk to King Lathas on the 1st floor of Ardougne Castle.
 * Talk to Koftik in the in the western most part of West Ardougne.
 * Enter the cave and run south at the first junction.
 * Talk to Koftik for a cloth. Use it on an arrow, then light it.
 * Equip your bow and fire arrow, then shoot the guide rope attached to the bridge.
 * Continue through the cave until you reach a gap. Use a rope on the tiny 'Old spike' at the edge of the gap.
 * Continue through the cave until you reach a large grid.
 * Surge across the grid. You will fall through some of the tiles. Pull the lever at the end.

Orbs of light

 * Run past the zombie camp, then search the odd markings on the corridor walls. Disarm the traps to get to the other side.
 * You will reach an altar, take the north path using planks on the flat rocks. Take the orb.
 * Take the north west path. Take the orb.
 * Take the west path, traversing the flat rocks as before. Take the orb.
 * Take the final path, don't pick up the orb until you have searched the rock first.
 * Return to the zombie camp.
 * Use the 4 orbs on the furnace.
 * Return to the altar, and climb down the well.
 * Dig the mud at (2).
 * Cross the ledge at (3).
 * If you have 50 thieving, take the short cut at (5) - avoid the bubbles!
 * If you lack 50 thieving, cross the wooden maze to get to the other side.
 * Enter the tunnel at (6).

Cold blooded killing

 * Search the unicorn cage.
 * Use the railing on the boulder above the unicorn.
 * Search the cage again.
 * Pass through the tunnel until you reach 3 knights.
 * Kill them and take their badges.
 * Continue forwards until you see a well.
 * Use the badges and horn on the well.
 * Open the door.

Iban's cavern

 * Run as south as you can, and take the stairs.
 * Talk to Niloof the dwarf.
 * Go upstairs and search the Witch's window (Use the map pictured to find her).
 * Pick up the Witch's cat (Use the map).
 * Use the cat on the Witch's door.
 * Search the chest in her house for a few items.
 * Talk to Klank the dwarf downstairs.
 * Take the bucket in the large house. Use it on the barrel in the small room.
 * Run east and use the brew on the tomb. Light it to obtain Iban's ashes.
 * Use the ashes on the doll.
 * Run to the north east corner, kill Kalrag the spider.
 * Go upstairs to the half souless area.
 * Wear Klank's gauntlets and search the cages Iban's dove will be in one of them.
 * Use the dove on the doll.
 * Kill the three demons west of the Witch and take their amulets.
 * Open the chest north of the middle demon. Pour the liquid on the doll.
 * Kill a Disciple of Iban in the middle of the maze.
 * Un-equip everything and equip the robes. You don't need planks or rope any more.
 * Enter Iban's temple and use the doll on the well.
 * Talk to Koftik at the end of the cave.
 * Return to King Lathas.
 * Quest complete!