Lesser Mummy Lord

Medium Undead, Lawful Evil

AC: 17

Initiative: +0 (10)

HP: 97 (13d8 + 39)

Speed: 20 ft.

STR: 18 (+4)
DEX: 10 (+0)
CON: 17 (+3)
INT: 11 (+0)
WIS: 18 (+4)
CHA: 16 (+3)

Saving Throws: Con +8, Int +5, Wis +9, Cha +8

Skills: History +5, Religion +5

Resistances: fire

Immunities: necrotic; poison; bludgeoning, piercing, slashing from nonmagical attacks

Condition Immunities: charmed; exhaustion; frightened; paralyzed; poisoned

Senses: darkvision 60 ft., Passive Perception 14

Languages: the languages it knew in life

CR: 15 (XP 6,500; PB +5)

Habitat: Desert

Magic Resistance.

The mummy lord has advantage on saving throws against spells and other magical effects.

Rejuvenation.

A destroyed mummy lord gains a new body in 24 hours if its heart is intact, regaining all its hit points and becoming active again. The new body appears within 5 feet of the mummy lord's heart.

Special Equipment.

The mummy wears a ring of fire resistance.

Actions

Multiattack.

The mummy can use its Dreadful Glare and makes one attack with its rotting fist.

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 must succeed on a DC 16 Constitution saving throw or be cursed with mummy rot. The cursed target can't regain hit points, and its hit point maximum decreases by 10 (3d6) for every 24 hours that elapse. If the curse reduces the target's hit point maximum to 0, the target dies, and its body turns to dust. The curse lasts until removed by the remove curse spell or other magic.

Dreadful Glare.

The mummy lord targets one creature it can see within 60 feet of it. If the target can see the mummy lord, it must succeed on a DC 16 Wisdom saving throw against this magic or become frightened until the end of the mummy's next turn. If the target fails the saving throw by 5 or more, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of all mummies and mummy lords for the next 24 hours.

Lair Actions

On initiative count 20 (losing initiative ties), the mummy lord takes a lair action to cause one of the following effects; the mummy lord can't use the same effect two rounds in a row:

Each undead creature in the lair can pinpoint the location of each living creature within 120 feet of it until initiative count 20 on the next round.
Each undead in the lair has advantage on saving throws against effects that turn undead until initiative count 20 on the next round.
Until initiative count 20 on the next round, any non-undead creature that tries to cast a spell of 4th level or lower in the mummy lord's lair is wracked with pain. The creature can choose another action, but if it tries to cast the spell, it must make a DC 16 Constitution saving throw. On a failed save, it takes 1d6 necrotic damage per level of the spell, and the spell has no effect and is wasted.

Regional Effects

A mummy lord's temple or tomb is warped in any of the following ways by the creature's dark presence:

Food instantly molders and water instantly evaporates when brought into the lair. Other non magical drinks are spoiled - wine turning to vinegar, for instance.
Divination spells cast within the lair by creatures other than the mummy lord have a 25% chance to provide misleading results, as determined by the DM. If a divination spell already has a chance to fail or become unreliable when cast multiple times, that chance increases by 25 percent.
A creature that takes treasure from the lair is cursed until the treasure is returned. The cursed target has disadvantage on all saving throws. The curse lasts until removed by a remove curse spell or other magic.

If the mummy lord is destroyed, these regional effects end immediately.

Find this creature in the encounter builder

Source: Tales from the Yawning Portal, p. 224 - Licenses and attribution