The Fire Well is an arena that appears to be surrounded by fire and its walls are decorated with the skeletal remains of defeated warriors. The skulls of some fighters even litter the floor, and hellfire burns endlessly and deeply behind the arena's grates. This arena made its debut in Mortal Kombat 4 and Mortal Kombat Gold. The arena has returned in Mortal Kombat: Armageddon with an updated version of itself.
The skulls that litter the ground can also be used as throwing weapons against your opponent. There appears to be only one entrance from a dark hallway. The Fire Well might be part of the hoary Netherrealm, as hellfire burns endlessly and deeply behind the grates, and the fallen Elder God Shinnok awaits challengers to add to his collection of mutilated bodies. It is where the heroes of Mortal Kombat battled with him in order to save the realms.
A different and also updated version of the same Mortal Kombat 4 arena in which the defenders of Earthrealm did battle with the evil Elder God Shinnok was featured in Mortal Kombat: Armageddon. On its bottom level, a conveyor belt which players can utilize as a death trap, operates on each wall with a large wheel at their ends, crushing blocks of stone. Should a kombatant lose sense of their footing and be knocked onto the belt, their life would soon end as their bones are ground into powder.
- There was an original sketch of the Fire Well but it wound up as a sketch in the Krypt and Kontent gallery special features of Mortal Kombat: Deadly Alliance. This concept was later incorporated into what is now the Lava Shrine.