My long and creepy creature of umbra species (species belong to https://t.me/danchikel)

Umbras are living incarnations of humanities most negative emotions and desires. They usually represent one of the deadly sins.
Author makes these fellas personally for people they know well. Mine in particular embodies gluttony and obsession.
Umbras are deceivers who love to involve humans into deadly contracts that result in numerous deaths, and they will scheme and lie in order to get sacrifices they so greatly desire…