Adair, The Whisper Of The Woods

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

Of Bark And Bone. Adair makes Dexterity (Stealth) checks at advantage. Additionally, any Wisdom (Perception) checks made to see her has disadvantage, and she has advantage on Dexterity (Stealth) checks made to hide.

War Caster: Adair makes saves on concentration saving throws at advantage 

Multiattack. Adair can make two Primal Savagery attacks or thorn whip attacks.

Bloodthirsty strike (3/day). When Adair hits a creature with a weapon attack, she can expend a charge to deal an extra 4d6 necrotic damage to the target, and regains a number of hit points equal to the necrotic damage dealt.

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

Cantrips (at will): Control Flames, Produce Flame, Poison Spray

1st level (4 slots): Cure Wounds, Entangle, Thunderwave

2nd Level (3 slots): Heat Metal, Pass Without Trace, Moonbeam, Spike Growth

3rd Level (3 Slots): Call Lightning, Plant Growth, Conjure Animals

4th Level (3 Slots): Blight, Grasping Vine, Guardian of Nature

5th Level (3 slots): Wrath Of Nature, Contagion, Tree Stride

6th Level (2 slots): Wall of thorns, Sunbeam

7th Level (1 slot): Fire Storm

 8th Level (1 slot) Antipathy/Sympathy

9th Level (1 Slot) Storm Of Vengeance

Primal Savagery. Melee spell attack: (1d20)+11 to hit. reach 5 ft., one target. Hit: 30 (4d10) acid damage.

Thorn Whip. Melee spell attack: (1d20)+11 to hit. reach 30ft., one target. Hit: 18 (4d6) piercing damage. If hit and the creature's size is large or smaller they are pulled 10ft closer to her.

Change Shape (2/Day). Adair magically transforms into a Beast or an Elemental with a challenge rating of 6 or less and can remain in that form for up to 9 hours. Adair can choose whether her equipment falls to the ground, melds with her new form, or is worn by the new form. Adair reverts to her true form if she dies or falls unconscious. Adair can revert to her true form using a bonus action.

While in a new form, Adair's stat block is replaced by the stat block of that form, except Adair keeps her current hit points, her hit point maximum, this bonus action, her languages and ability to speak, and her Spellcasting action.

The new form’s attacks count as magical for the purpose of overcoming resistances and immunity to nonmagical attacks.

Spore Burst (1/day): Adair emits poisonous spores, which fill a 10-foot-radius sphere centered on yourself. Each creature in that area must succeed on a DC 15 Constitution saving throw or have the poisoned condition until the end of her next turn.