Multiattack

The mummy lord uses Dreadful Glare and then attacks with its rotting fist.

Dreadful Glare (Gaze)

The mummy lord targets a creature within 60 feet. The target makes a DC 16 Wisdom saving throw. On a failure it is magically frightened until the end of the mummy lords next turn. If the target fails the save by 5 or more it is paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of mummies and mummy lords for 24 hours.

Rotting Fist

Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 14 (3d6 + 4) bludgeoning damage plus 21 (6d6) necrotic damage. If the target is a creature it makes a DC 17 Constitution saving throw. On a failure it is cursed with Mummy Rot.

Dispel Magic (3rd-Level; V, S)

The mummy lord scours the magic from one creature object or magical effect it can see within 120 feet. A spell ends if it was cast with a 3rd-level or lower spell slot. For spells using a 4th-level or higher spell slot the mummy lord makes a Wisdom ability check (DC 10 + the spells level) for each one ending the effect on a success.

Guardian of Faith (4th-Level; V)

A Large indistinct spectral guardian appears within an unoccupied space within 30 feet and remains for 8 hours. Creatures of the mummy lords choice that move to a space within 10 feet of the guardian for the first time on a turn make a DC 17 Dexterity saving throw taking 20 radiant or necrotic damage (mummy lords choice) on a failed save or half damage on a success. The spell ends when the guardian has dealt 60 total damage.

Contagion (5th-Level; V, S)

Melee Spell Attack: +9 to hit, reach 5 ft., one creature. Hit: The target contracts a flesh-rotting disease. It has disadvantage on Charisma ability checks and becomes vulnerable to all damage. The target makes a DC 17 Constitution saving throw at the end of each of its turns. After 3 failures the target stops making saving throws and the disease lasts for 7 days. After 3 successes the effect ends.

Harm (6th-Level; V, S)

The mummy lord targets a creature within 60 feet. The target makes a DC 17 Constitution saving throw. On a failure the creature is diseased taking 49 (14d6) necrotic damage. Its hit point maximum is reduced by the same amount for 1 hour or until the effect is removed with a spell that removes diseases. On a successful save the creature takes half the damage. The spells damage can't reduce a target to less than 1 hit point.