Legendary Resistance (3/Day). If Zotziliha fails a saving throw, he can choose to succeed instead.

Regeneration. Zotziliha regains 20 hit points at the start of his turn if he has at least 1 hit point and isn’t in running water. If he takes radiant damage or damage from holy water, this trait doesn’t function at the start of his next turn.

Spellcasting. Zotziliha is a 9th-level spellcaster. His spellcasting ability is Intelligence (spell save DC 18, +10 to hit with spell attacks). He has the following wizard spells prepared:

Cantrips (at will): mage hand, prestidigitation, ray of frost

1st level (4 slots):comprehend languages, fog cloud, sleep

2nd level (3 slots): detect thoughts, gust of wind, mirror image

3rd level (3 slots): animate dead, fireball, nondetection

4th level (3 slots): blight, greater invisibility, polymorph

5th level (1 slot): animate objects, scrying

Spider Climb. Zotziliha can climb difficult surfaces, including upside down on ceilings, without having to make an ability check.

Vampire Weaknesses. Zotziliha has the following flaws:

Forbiddance. He can’t enter a residence without an invitation from one of the occupants.

Harmed by Running Water. He takes 20 acid damage if he ends his turn in running water.

Stake to the Heart. If a piercing weapon made of wood is driven into his heart while he is incapacitated in his coffin, he is paralyzed until the stake is removed.

Multiattack. Zotziliha can use his Frightful Presence. He then makes four attacks, only one of which can be a bite attack.

Claw. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 17 (2d8 + 9) slashing damage plus 14 (4d6) necrotic damage. If the target is a creature, Zotziliha can grapple it (escape DC 18) instead of dealing the slashing damage.

Bite. Melee Weapon Attack: +12 to hit, reach 5 ft., one willing creature, or a creature that is grappled by Zotziliha, incapacitated, or restrained. Hit: 7 (2d6 + 9) piercing damage plus 10 (3d6) necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and Zotziliha regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if its hit point maximum is reduced to 0. A humanoid slain in this way and then buried in the ground rises the following night as a vampire spawn under Zotziliha’s control.

Frightful Presence. Each creature of the dragon’s choice that is within 120 feet of the dragon and aware of it must succeed on a DC 21 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the dragon’s Frightful Presence for the next 24 hours.

Debilitating Screech (Recharge 5–6). Zotziliha exhales a pulse of high-pitched, nearly inaudible sound in a 90-foot cone. Each creature in that area must make a DC 23 Constitution saving throw. On a failed save, the creature takes 55 (10d10) thunder damage and is incapacitated until the end of its next turn. On a successful save, the creature takes half as much damage and isn’t incapacitated.

Vampiric Shroud. Zotziliha exhales a swarm of tiny spirit bats that attack any creatures of his choice within a 90-foot radius sphere around him. . Each creature in that area must make a DC 23 Constitution saving throw. On a failed save, the creature takes 16 (4d8) necrotic damage. On a successful save, the creature takes half as much damage. Regardless of whether the creature saves or not, Zotziliha regains hit ponts equal to the amount of necrotic damage he inflicted to all targets with this ability.

Zotziliha can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Zotziliha regains spent legendary actions at the start of his turn.

Move. Zotziliha moves up to his speed without provoking opportunity attacks.

Claw. Zotziliha makes one claw attack.

Bite (Costs 2 Actions). Zotziliha makes one bite attack.