Aweald

A large lumbering monstrosity thought to originally be a plague on mankind for their trespassing into the forest. Seemingly made of all plants with a rough and thorny bark shell for exterior the flesh of this creature is rancid like rotting meat. An Aweald does not hunt for food or pleasure, for it gains its nutrients from sunlight or decaying flesh and plants around it. An Aweald kills when one wanders into its territory, or when it deems its lair has fallen into disrepair or outgrows its current home. The lair of an Aweald is made from decaying plants and the rotting corpses of any living animal that is unfortunate to stumble across its path. 

Made in underground recesses or in particularly dense thickets of trees and vegetation, an Aweald will use the corpses and decaying plant matter to build a large dwelling complete with walls, a roof, flooring and perhaps even multiple chambers to their lair.

Lair Actions

On initiative count 2 (losing initiative ties), the Aweald takes a lair action to cause one of the following effects; the Aweald can’t use the same effect two rounds in a row:

• Corpse Collapse; the Aweald rams the walls of its lair causing corpses to fall and batter the opponents and sicken them. Take 1d6 + 2 bludgeoning damage on a failed dexterity save from fallen corpse. On a failed constitution save become sickened and fall prone for 1 round.
• Release Decay; the Aweald releases a necrotic shroud that causes the corpses around it to start rapidly decaying, creating an increase in toxic chemicals. Creatures in lair take 1d4 necrotic damage on a failed save.