Mycolithic Resilience (Recharges after Long Rest). The first time Virel is reduced to 0 hit points, his body erupts into a fungal bloom. He regains 75 hit points, gains +2 AC, and advantage on Con saves for 1 minute.

Symbiotic Summoner. (Recharge 5-6) Virel casts Fungal Infection, instantly transforming up to two corpses into Spore Servants. You seed a corpse with fungal spores, animating it as a Spore Servant under your control.

• The servants act on your initiative, but only take the Dodge action unless you use a bonus action to command them to take another action (Attack, Dash, Disengage, or Help).

• Each servant uses its Slam attack when ordered to attack.

• They remain animated until reduced to 0 hit points or until the spell ends.

Fungal Link (Virel’s Enhancement). While within 60 feet of Virel, each Spore Servant deals an extra 1d4 poison damage on its Slam attacks.

Spellcasting

Virel is a 12th-level spellcaster. His spellcasting ability is Intelligence (spell save DC 17, +9 to hit). He requires no material components for biomancy spells.

Cantrips (at will): Infestation
1st level (4 slots): Corrupting Ichor, Shield, Mirror Image
2nd level (3 slots): Endoleech, Misty Step
3rd level (2 slots): Stinking Cloud
5th level (2 slots): Bone Cage, Wall of Thorns
6th level (2 slot): Mass Suggestion (fungal chorus whispers)
7th level (1 slot): Finger of Death (reflavored as necrotic fungal bloom)

 Spore Cloud (Cantrip — Level 11 Scaling): Casting Time: 1 action. Range: Self (15-foot radius). Duration: Instantaneous. Virel exhales a puff of invasive spores that fill the air around him. Each creature of your choice within a 15-foot radius must succeed on a DC 17 Constitution saving throw or take 3d6 poison damage and be poisoned until the end of its next turn.

• Unstable Symbiosis. A creature poisoned in this way experiences fungal visions. Once the poisoned condition ends, that creature has advantage on the next attack roll, ability check, or saving throw it makes against Virel Myxarro before the end of its subsequent turn.

Spore Communion (Recharge 5–6). Virel releases a psychic-fungal spore cloud in a 30-foot radius. Each creature of his choice must succeed on a DC 17 Con save or take 27 (6d8) poison damage and 18 (4d8) psychic damage and must use its reaction to speak unsettling fungal whispers. On a success, they take half damage and no compulsion.

Multiattack: Virel makes two attacks with his Staff of Hyphae, he may make any combination of melee/ranged attacks.

Staff of Hyphae (Melee Weapon Attack). +7 to hit, reach 5 ft., one target. Hit: 10 (1d8+6) bludgeoning damage plus 9 (2d8) poison damage.

Staff of Hyphae (Ranged Weapon Attack). +5 to hit, reach 60ft., one target. Hit: 10 (1d8+6) acid damage plus 9 (2d8) poison damage.

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

• Spore Burst (Costs 1). Release a 15-ft spore cloud; creatures must make a DC 15 Constitution saving throw or take 7 (2d6) poison damage and are poisoned until the end of their next turn.

• Spells: (Costs 1) Aura of Impurity
  
  

• Thrall Command (Costs 2). One fungal thrall makes an immediate attack.

• Necrotic Bloom (Costs 3). A corpse within 30 ft. erupts in a necrotic spore bloom; all creatures in 15-ft radius take 18 (4d8) necrotic damage (Con save DC 17 for half).