Sieni

The Sieni were a crepuscular subrace of elves who lived throughout the fungal jungles of Kharn. Considered by many to be abjectly evil, the Sieni were masters of necromantic and druidic magic, and considered death and decay to be sacred.

Their flesh ranged from a sickly puce to pallid blue-grey, punctuated unsettling fungus-like features such as seeping, gaping pores, gills under the jaw, or antler-like grows from the head or spine.

Their eyes and hair typically took on natural tones - browns and mossy greens.

Foul Symbiote. You know the infestation cantrip (XGE, pg. 158). When you reach 3rd level, you can cast the false life (PHB, pg. 239) spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the wither and bloom (SCC, pg. 38) spell once with this trait and regain the ability to do so when you finish a long rest. Casting these spells with this trait doesn't require material components. Wisdom is your spellcasting ability for these spells.

Weed Walk. You can move across difficult terrain made of plants or fungi without expending extra movement.