Druidlights: Spirits of the Natural Order

[Beefermatic]

You have inspired me to create a new category of creature (they may already exist in D&D in some capacity). Its sentient plant life (in the Feywild) that grows around dead bodies and is extremely toxic to the living.

That sounds really interesting, reminds me of my buddy's idea about a species of extradimensional monsters that are neither plant or animal but have traits of both called the Jahl.