Black Knight Greataxe
An alternative form of the Cemetery of Ash, a passage into another version of the world, without fire.
This area is connected to the passage behind Oceiros, the Consumed King's boss room. There is a chest at the end of this passage, and behind the chest is an illusory wall that hides the path to the Untended Graves.
It is here where you find the Eyes of a Fire Keeper, allowing you to achieve the End of Fire ending.
- Found on a corpse in Dark Firelink Shrine, behind an illusory wall where Irina sits in the regular Firelink Shrine.