Mr Withers' anatomical drawings of the Atropal (Patreon)

In the Tomb of Annihilation, Mr Withers enjoys drawings anatomical studies of the jungle animals - they are proudly on display in his office. He must've, during his long undead tenure, gone down to the Cradle of the Death God and applied his hand in capturing the various stages of the Atropal feeding on souls. 

These are his notebook sketches.