TEXT: Soul Reaver
  Sometimes when a wicked humanoid dies their soul 
  clings and claws to the mortal world so greatly that it 
  leaves a kind of spiritual tunnel straight from their old 
  body to whatever hell came next. When that happens, a 
  soul reaver is created. Soul reavers appear somewhat 
  like zombies although the space between the top of 
  their jaw and their navel is a distorted and translucent 
  window into a shadowy reflection of the mortal world.
  Soul Hole. The soul reaver feels an aching where its 
  own soul used to be and it longs to fill it with the souls 
  of other humanoids. After its creation, soul reavers 
  wander until they find a settlement and then consume 
  as many creatures as they can. Sometimes these 
  settlements are unable to defend themselves against the 
  soul reaver’s nightmarish attack and are slain to the last 
  and sometimes they are able to mount a defense against 
  the unholy creature ending its abhorrent existence. 
  Either way, an encounter with the soul reaver is retold 
  for generations and seemingly inevitably followed by a 
  rise in hauntings and unquiet spirits.
  And Hell Followed. Mercifully the soul reaver does 
  not send its victims to whatever hell it soul was sent to. 
  Instead, creatures who pass through the soul reaver by 
  design or by the soul reaver’s katabasis attack are sent 
  into the Border Ethereal of the plane they are currently 
  on. A creature transported in this way suffers a level 
  of exhaustion for each 24 hours they are in the Border 
  Ethereal. Any creature that dies while under this effect 
  in the Border Ethereal immediately rises again as an 
  incorporeal undead on the material plane.
  Undead Nature. A soul reaver does not require air, 
  drink, food, or sleep.
  Soul Reaver by
  /u/ coolgamertagbro
  http://sterlingvermin.com/
  Art Credits in Order of Appearance
  “Portal Zombie” by slim mittens
  PDF compiled, edited and designed to resemble the official Monster Manual by /u/Barkalot
  Soul Reaver
  
SOURCE: textdata/thevault/Dungeons & Dragons [multi]/5th Edition (5e)/3rd Party/Benjamin Huffman/Soul Reaver.pdf