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Mahkteah, The Lord of Perdition

A Crimson Moon boss, fought at Ancient Chamber.

Mahkteah, The Lord of Perdition is a boss in Crimson Moon. The fight happens at Ancient Chamber, and it is a World Boss, fought as a run's final encounter. Defeating it unlocks Burning Heart.

Location
Ancient Chamber
Ward
Unknown
Where in a run
A World Boss — the run's final encounter
Weapon unlocked
Burning Heart
Health and phases
Not published
Weaknesses
Not published

What it unlocks

Where this fight sits in a run

A run is 3 missions and then a boss, each mission 15 to 45 minutes, starting and ending at Sanctus Clypeus. This is a World Boss, so defeating it awards an Abraxas Stone. Three of those changes the final encounter of a later run from a World Boss to the Final Boss.

What is not known

No health totals, phase counts, resistances, damage types or drop tables are published for any boss in Crimson Moon, and this site does not estimate them. Those numbers live in the game’s own DataTables, which ship compressed in a format nothing available can read yet.

So there is no weakness section on this page, and its absence is the honest answer rather than an omission. If you have fought Mahkteah, The Lord of Perdition and know something concrete, that is exactly the kind of correction worth sending.