Innate Spellcasting. Yuri's innate spellcasting ability is Charisma (spell save DC 23). Yuri can innately cast the following spells, requiring no material components:

At will: druidcraft, guidance, thorn whip, create or destroy water, entangle, faerie fire, goodberry, conjure animals, plant growth, grasping vine, ensnaring strike, dissonant whispers, crown of madness

10/day each: enhance ability, moonbeam, blight, tree stride, heal

3/day each: sunbeam, wall of thorns, regenerate

1/day each: feeblemind

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

Legendary Resistance 3/Day. If Yuri fails a saving throw, She can choose to succeed instead. Once she uses this feature completely, Yuri can't use it again until she finishes a long rest. 

Speak with Beasts and Plants. Yuri can communicate with beasts and plants as if they share a language.

Undying State. As long as she has at least 1 HP left, Yuri regains 30 HP at the beginning of her turn. 

Claws. Yuri grows claws from her fingertips. Melee Weapon Attack:  +15 to hit reach 5 ft., one target. Hit: 40 (5d12) slashing damage.

Fangs. Melee Weapon Attack: +13 to hit, reach 5 ft., one willing creature, or a creature that is grappled by Yuri, incapacitated, or restrained. Hit: 20 (3d6 + 5) piercing damage.

Axe of the Spring Queen. Yuri summons a Battleaxe made from steel and magical wood. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 45 (10d8) slashing damage.

Smash (Only in Guardian of Nature form). Melee Weapon Attack: +17 to hit, reach 5 ft., one target. Hit: 60 (10d10) Blugeoning damage.

Fey Charm. Yuri targets one humanoid or beast that she can see within 30 feet of her. If the target can see Yuri, it must succeed on a DC 23 Wisdom saving throw or be magically charmed. The charmed creature regards Yuri as a trusted friend to be heeded and protected. Although the target isn’t under Yuri’s control, it takes Yuri’s requests or actions in the most favorable way it can.

Each time Yuri or her allies do anything harmful to the target, it can repeat the saving throw, ending the effect on itself on a success. Otherwise, the effect lasts 24 hours or until Yuri dismisses it. If a target’s saving throw is successful, the target is immune to the Yuri's Fey Charm for the next 24 hours.

Yuri can have no more than three humanoids and up to ten beasts charmed at a time.

Shapechange. Yuri can transform into one beast of her choice of a CR of 2 or lower, all items she is carrying morphing to said form. She can use this bonus action to turn back as well.

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

Guardian Of Nature. Yuri can change her form from medium to huge. During this change, she is considered a Siege Monster, doing double damage to buildings and forts. Additionally, she gains bark-like skin which gives her a +3 on her AC, Advantage on checks against spells and ending effects on herself, and Advantage on STR saves. However, she gains Disadvantage on DEX saves. 

Healer's Touch. Yuri can bestow 3d10 Temporary Hit Points to three people of her choice that she can see.