- This article is about a landmark. This name is also used for a mission, an outpost, and a Zaishen mission.
Abaddon's Mouth is the name of the largest volcano on the Ring of Fire Island Chain. In its caldera lies the Door of Komalie and the Ring of Fire bloodstone. The Onyx Gate surrounds the volcano and the players go through and around the volcano during the Abaddon's Mouth and Hell's Precipice missions. During the Abaddon's Mouth mission, Optimus Caliph and another random Mursaat boss can be found guarding the entrance to the caldera.