The inferno dragon is a level 289 dragon that can be found in the Tzhaar-Ko Dungeons. There are only two of them, and they are the third most powerful monster in the dungeons. They require level 81 slayer to kill; however, they are not assigned as tasks by Slayer Masters. They can, however, be killed in place of Red dragons on a Red dragon task, but this is not recommended, as regular Red dragons are far easier to kill. Other than for Slayer tasks, they are mainly fought for the valuable Vial of flames that they drop, which goes for around two million coins on the Grand Exchange.