Corrupted Dryad

Innate Spellcasting. The dryad's innate spellcasting ability is Charisma (spell save DC 14). The dryad can innately cast the following spells, requiring no material components:

At will: corrupted druidcraft

3/day each: entangle, phantasmal force

1/day each: barkskin, invisibility (self only), blade of corruption

Magic Resistance. The corrupted dryad has advantage on saving throws against spells and other magical effects.

Tree Stride. Once on her turn, the corrupted dryad can use 10 feet of her movement to step magically into one non-living tree within her reach and emerge from a second non-living tree within 60 feet of the first tree, appearing in an unoccupied space within 5 feet of the second tree. Both trees must be Large or bigger. Due to her corrupted nature, she may only use trees that are either dead or equally corrupted by abyssal touch.

Corrupt Nature. One time per day, the corrupted dryad can spew forth abyssal corruption into the natural world around her. In this manner she corrupts creatures, plant life, and ground in a 60 foot radius. Creatures and plant life within this radius are corrupted by abyssal forces turning creatures into demonic versions of their type and plants become corrupted by demonic energy. The ground becomes equally corrupted, causing effects similar to those found on the Abyssal planes. 

Multiattack. The corrupted dryad makes two weapon attacks.

Dagger. Melee Weapon Attack: +6, reach 5 ft., one target. Hit: 10 (1d4)+8 piercing damage.

Blade of Corruption. Melee Weapon Attack: +6, reach 5 ft., one target. Hit: 9 (3d6) necrotic damage.

Fey Charm. The dryad targets one humanoid or beast that she can see within 30 feet of her. If the target can see the dryad, it must succeed on a DC 14 Wisdom saving throw or be magically charmed. The charmed creature regards the dryad as a trusted friend to be heeded and protected. Although the target isn't under the dryad's control, it takes the dryad's requests or actions in the most favorable way it can.

Each time the dryad or its 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 the dryad dies, is on a different plane of existence from the target, or ends the effect as a bonus action. If a target's saving throw is successful, the target is immune to the dryad's Fey Charm for the next 24 hours.

The dryad can have no more than one humanoid and up to three beasts charmed at a time.