Mictlantecuhtli

Notes:

 * Located in the area of (G-5) through (H-4) among the Wiederganger.
 * Healed by physical and magical damage.
 * Magical damage heals it when: Mictlantecuhtli is casting, using a Job ability.
 * Physical damage heals it when: Mictlantecuhtli is not casting, is not using a Job ability.
 * Ranged damage heals it when: Bow heals it on non-critical hits only, gun/crossbow heal it on critical hits.
 * Casts tier IV nukes, Sleepga II, Drain and aga III's
 * Magic attacks outside of Drain are very weak compared to most.
 * Drain is tremendously powerful, drained 1598 + breaking high stoneskin. Blink tank is highly recommended.
 * Double Attacks very frequently, possibly 60 or 70%.
 * Uses Final Retribution.
 * Susceptible to Slow and Elegy. Very susceptible to Paralyze (the effect occurs a lot with a significantly potent one).
 * Appears to cut Magic Damage by roughly 50%. Whether this is MDB or -MDT% is unknown.
 * Sometimes casts spells with varying degrees of Fast Cast. Appears random.
 * Rages after 60 minutes (immune to debuffs and significantly stronger melee attacks. Did not see whether magic attacks were also enhanced though it is fair to assume they are).
 * Can Danse Macabre (single target charm).
 * Formless Strikes did damage but seemed to be greatly resisted, 1-3 damage/hit.
 * Has a decent movement speed+

Historical Background
Mictlantecuhtli' (Nahuatl pronunciation: [miktɬaːnˈtekʷtɬi], meaning "Lord of Mictlan"), in Aztec mythology, was a god of the dead and the king of Mictlan (Chicunauhmictlan), the lowest and northernmost section of the underworld. He was one of the principal gods of the Aztecs and was the most prominent of several gods and goddesses of death and the underworld (see also Chalmecatl). The worship of Mictlantecuhtli sometimes involved ritual cannibalism, with human flesh being consumed in and around the temple.