Cillian (Spore Archdruid)

Archdruid. Cillian can use his Wild Shape an unlimited number of times and can ignore V, S, and M (with no cost and aren't consumed) components when casting in normal or wild shape forms.

War Caster. Cillian can perform the somatic components of spells even when he has weapons or a shield in one or both hands

Spellcasting. Cillian is a 20th-level spellcaster. His spellcasting ability is Wisdom (spell save DC 19, +11 to hit with spell attacks). He has the following druid spells prepared:

Cantrips (at will): druidcraft, produce flame, mold earth

1st level (4 slots): cure wounds, healing word, create or destroy water, faerie fire

2nd level (3 slots): animal messenger, gentle repose, blindness/deafness, lesser restoration

3rd level (3 slots): animate dead, dispel magic, erupting earth, gaseous form

4th level (3 slots): blight*, charm monster, confusion, freedom of movement

5th level (3 slots): cloudkill, contagion, greater restoration, wall of stone

6th level (2 slots): druid grove, heal, investiture of stone, transport via plants

7th level (2 slots): fire storm, regenerate, reverse gravity

8th level (1 slot): animal shapes, feeblemind, tsunami

9th level (1 slot): foresight, shapechange, storm of vengeance

Scimitar. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 7 (1d6+4) slashing damage.

Symbiotic Entity. Cillian can use Wild Shape to awaken the spores that infuse him to gain +80 temp HP, he rolls double damage dice for his Halo of Spores damage, and deal 1d6 additional poison damage when he hits with a melee weapon attack. These all last for 10 minutes, or until he loses all these temporary hit points, or until he uses his Wild Shape again.

Wild Shape. As an action, Cillian can magically assume the shape of any beast (Max CR 1). He can stay in beast shape for 10 hours before reverting back to his normal form (or as a bonus action earlier or if he falls unconscious, drops to 0 hit points, or dies).

Cillian 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. Cillian regains spent legendary actions at the start of his turn.

Halo of Spores. Cillian can deal 11 (2d10) or 22 (4d10) necrotic damage to one creature he can see when it ends its turn in a space within 10 feet of him if it fails a CON saving throw (DC 19).

Minor Magic. Cillian can use a spell of 3rd level or lower (including cantrips) that requires an action to cast

Summon the Swarm. Cillian summons up to 10 myconds in unoccupied spaces within his line of sight. These have 1 hit point and can only take the attack action  (Fist. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 5 bludgeoning damage plus 5 poison damage.)

Spreading Spores. While the Symbiotic Entity feature is active, Cillian can hurl spores up to 30 feet away, where they swirl in a 10-foot cube for 1 minute. Whenever a creature moves into the cube or starts its turn there, that creature takes Halo of Spores damage, unless the creature succeeds on a Constitution saving throw (DC 19). A creature can take this damage no more than once per turn.