The Burning Monolith

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The Burning Monolith, also known as The Monolith, is the pinnacle endgame encounter. It is a giant fortress that emerged from underground surrounded by a giant maze.

Pinnacle Keys

Main page: The Arbiter of Ash

Three keys must be obtained to enter. Each key can be obtained from defeating each faction's two lieutenants and the faction leader. There are two sets of keys that can drop; Crisis Fragments can drop from any version of the Citadel boss, while Calamity Fragments only drop if the player has allocated 10 points into the Boss Atlas Passive Tree. Failing against any of these bosses will cause that citadel to be considered failed and no longer accessible.

Factions

Citadel boss	Crisis Fragment	Calamity Fragment	Faction Map	Color on Atlas
Count Geonor	Ancient Crisis FragmentAncient Crisis FragmentA carved piece of something older than the Vaal.Can be placed in a door in The Burning Monolith.	File:Primary Calamity Fragment inventory icon.pngPrimary Calamity FragmentPrimary Calamity FragmentIt bears a pictograph of a lunar eclipse made crimson by crystallised Corruption.Can be placed in a door in The Burning Monolith.File:Primary Calamity Fragment inventory icon.png	The Iron Citadel	Blue
Jamanra, the Abomination	Faded Crisis FragmentFaded Crisis FragmentThe carvings it holds are too worn to decipher.Can be placed in a door in The Burning Monolith.	File:Secondary Calamity Fragment inventory icon.pngSecondary Calamity FragmentSecondary Calamity FragmentIt bears a pictograph of three stones being placed at the foot of a great tower.Can be placed in a door in The Burning Monolith.File:Secondary Calamity Fragment inventory icon.png	The Copper Citadel	Orange
Doryani, Royal Thaumaturge	Weathered Crisis FragmentWeathered Crisis FragmentPictographs seem to convey a dire warning.Can be placed in a door in The Burning Monolith.	File:Tertiary Calamity Fragment inventory icon.pngTertiary Calamity FragmentTertiary Calamity FragmentIt bears a pictograph of vast flames sweeping across mountains and forests.Can be placed in a door in The Burning Monolith.File:Tertiary Calamity Fragment inventory icon.png	The Stone Citadel	Red