Colossal Plaguespew Mawrat
Family: Mawrat
Type: Low Drop / Rare Spawn
Zone: Zereth Mortis
Faction: Both
Drop Chance: Roughly 3%
Recommended Level: Level 60
Skill Level: 2/10
Guide
The Colossal Plaguespew Mawrat mount has roughly a 3% drop chance from Rhuv, Gorger of Ruin in Zereth Mortis. Rhuv is actually the rare, Iska, Outrider of Ruin’s mount. Iska functions as a normal rare does while Rhuv’s corpse will only be lootable if you got the mount. They also have separate daily loot lockouts.
How to unlock Zereth Mortis
To get to Zereth Mortis, you must have completed chapter 2 in the 9.1 (Korthia) campaign. The last quest required is Charge of the Covenants. After it is completed, you should get a popup to start the Zereth Mortis (9.2) campaign. You get a portal to Zereth Mortis on the top floor of Oribos after completing the This Old Waystone quest which is part of the campaign. If you leave Zereth Mortis before completing that quest, you can speak to Tal-Inara in Oribos to return.
Iska and Rhuv share a spawn location with two other rares: High Reaver Damaris and Reanimatrox Marzan. All three do not have regular respawn timer and you can’t really predict which will spawn. It is currently unknown exactly what triggers them to spawn but it is believed to be linked to other rares being killed in Zereth Mortis.
As of Dragonflight, there are not usually a lot of people in the zone so rares aren’t getting spam killed and thus the spawns of these three are notoriously rare. If you’re on a server with a high population, you may get lucky just camping in the zone. If you’re not, I would recommend killing every rare spawn you see, even if you have already killed it that day. Best of luck farming this mount!