"The Chaos portal, located in the Tunnel of Chaos, is a portal to the Chaos altar that becomes available during the What Lies Below quest. A talisman (chaos talisman/omni-talisman), tiara (chaos tiara/omni-tiara), talisman staff (chaos talisman staff/omni-talisman staff) or wicked hood is needed to use this portal. A tiara or staff version of either of the talismans will also suffice. It appears to look like the portals used to exit from Runecrafting altars or those found within the Chaos Tunnels."@en . . "Chaos portal"@en . . . "The Chaos portal, located in the Tunnel of Chaos, is a portal to the Chaos altar that becomes available during the What Lies Below quest. A talisman (chaos talisman/omni-talisman), tiara (chaos tiara/omni-tiara), talisman staff (chaos talisman staff/omni-talisman staff) or wicked hood is needed to use this portal. A tiara or staff version of either of the talismans will also suffice. It appears to look like the portals used to exit from Runecrafting altars or those found within the Chaos Tunnels."@en . .