Autumn Nymph

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

At will: druidcraft

3/day each: detect thoughts, shillelagh

1/day each: barkskin, fly, sleep

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

Speak with Beasts and Plants. The nymph can communicate with beasts and plants as if they shared a language.

Club. Melee Weapon Attack: +2 to hit (+6 to hit with shillelagh), reach 5 ft., one target. Hit: 2 (1d4) bludgeoning damage, or 8 (1d8 + 4) bludgeoning damage with shillelagh.

Whisper Game. The nymph targets one single creature that she can see within 60 feet of her. That creature must succeed on a DC 14 Wisdom saving throw. On a failed save, it is afflicted by maddening whispers, takes 3d6 psychic damage and has disadvantage on all attack rolls.At the end of each of its turns, the creature can repeat the saving throw. If it succeeds, the effect ends but another creature within 30 feet of the nymph's choice which is not currently affected by the original affect of Whisper Game. If the nymph is reduced to 0 hit points, the game ends and the creature currently under its effects takes 3d6 psychic damage.

If a creature saves against the original effect, it instead takes half the damage and the game has no other effect. 

A nymph can only have one creature under the effect of the Whisper Game at any time, and a creature which saves against the whisper game is immune to any nymph's Whisper Game for 24 hours. A creature who is reduced to 0 hit points while under the effect of the whisper game falls asleep (and is stable) for 1 hour, whereupon it wakes up.