Infectious Aura. A creature that touches Zuggtmoy or hits her with a melee attack must make a Constitution saving throw (DC 22, 1 per turn) or take 2d10 poison damage.

Innate Spellcasting. Zuggtmoy’s spellcasting ability is Charisma (spell save DC 24). She can innately cast the following spells, requiring no material components:

At will: detect magic, locate animals or plants, phantasmal killer, ray of sickness

3/day each: dispel magic, ensnaring strike, entangle, plant growth, shield

1/day each: cloudkill, etherealness, teleport

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

Lingering Influence. Any area affected by the spells plant growth or spike growth has the spells effect linger for an additional 2 turns even if concentration was broken.

Magic Resistance. Zuggtmoy has advantage on saving throws against spells and other magical effects.

Magic Weapons. Zuggtmoy’s weapon attacks are magical.

Multiattack. Zuggtmoy makes four pseudopod attacks.

Pseudopod. Melee or Ranged Weapon Attack: +16 to hit, reach 10 ft. or range 20/60 ft., one target. Hit: 20 (3d8 + 6) bludgeoning damage plus 17 (3d10) poison damage.

Infestation Spores (3/Day). Zuggtmoy releases spores that burst out in a cloud that fills a 20-foot-radius sphere centered on her, and it lingers for 1 minute. Any flesh-and-blood creature in the cloud when it appears, or that enters it later, must make a DC 19 Constitution saving throw. On a successful save, the creature can’t be infected by these spores for 24 hours. On a failed save, the creature is infected with a disease called the spores of Zuggtmoy and also gains a random form of madness (determined by rolling on the Madness of Zuggtmoy table) that lasts until the creature is cured of the disease or dies. While infected in this way, the creature can’t be reinfected, and it must repeat the saving throw at the end of every 24 hours, ending the infection on a success. On a failure, the infected creature’s body is slowly taken over by fungal growth, and after three such failed saves, the creature dies and is reanimated as a spore servant if it’s a type of creature that can be.

Mind Control Spores (Recharge 5–6);Zuggtmoy releases spores that burst out in a cloud that fills a 20-foot-radius sphere centered on her, and it lingers for 1 minute. Humanoids and beasts in the cloud when it appears, or that enter it later, must make a DC 19 Wisdom saving throw. On a successful save, the creature can’t be infected by these spores for 24 hours. On a failed save, the creature is infected with a disease called the influence of Zuggtmoy for 24 hours. While infected, the creature is charmed by her and can’t be reinfected by these spores.

Protective Thrall. When Zuggtmoy is hit by an attack, one creature within 5 feet of Zuggtmoy that is charmed by her must use its reaction to be hit by the attack instead.

Lichen Growth. When Zuggtmoy is hit by a ranged attack, she can cast an altered version of spike growth. This version summons fungi in the area, making it difficult terrain, and for every 5 feet of movement, the creature takes 2d4 poison damage.

Zuggtmoy 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. Zuggtmoy regains spent legendary actions at the start of her turn.

Attack. Zuggtmoy makes one pseudopod attack.

Exert Will. One creature charmed by Zuggtmoy that she can see must use its reaction to move up to its speed as she directs or to make a weapon attack against a target that she designates.

Teleport. Zuggtmoy can teleport to an area within 120 ft. that she has affected with plant growth or her modified spike growth.