TEXT: Life After Death.
  You have recently died, causing your spirit to leave your body
  and begin its journey into the afterlife. Or so you thought, be
  it a natural phenomenon, an angry spirit robbing you of your
  choice to move on, a god punishing you, or another reason,
  you're now a wandering spirit and must abide by the rules
  below.
  Wandering Spirit
  Feats Gained
  Undead Status
  Ethreal Touch
  Weakened Regeneration
  Silent as the Grave
  Call of the Eons
  Undead Status
  You are considered undead in addition to your other types.
  Ex. if you were an orc in life, you are an undead orc when you
  gain this feature.
  You are vulniriable to radiant damage and any damage you
  deal in this form is considered necrotic damage.
  You lose any special vision you once had and instead have a
  normal vision and a normal range (60ft) of it; the only
  exception to this rule is truesight.
  Ethreal Touch
  If you were to attempt to physically interact with an item or
  object, make a wisdom check and look at the table below to
  determine if you can. If you match or beat the DC below, you
  do not need to roll again to interact with the object; crit
  successes act as a flat success.
  You can move through wooden walls and windows.
  Your character's
  wisdom modifer
  DC needed to beat to interact with an
  item in the physical world.
  0
  20
  +1
  18
  +2
  16
  +3
  14
  +4
  12
  +5
  10
  It's Not Just a Good Time
  The most dangerous part of being a wandering spirit is the fact
  that should you die in this form, you cannot be revived or
  brought back; your soul enters the void.
  Weakened Regeneration
  You have, at most, a number of hit dice equal to your wisdom
  modifier.
  Also, you cannot be healed by spells or potions. You can
  however gain or be given temporary hp.
  Silent as the Grave
  Wandering spirits are unseen and generally unfelt in the
  world, though a wandering spirit can be seen and heard if a
  target is aware of their presence and is open to seeing them.
  Call of the Eons
  Over a period of time (minimum 15 days) you can alter your
  personal image based on your thoughts, for instance, if you
  are moving around as a wandering spirit, you may eventually
  forgot you need to walk, thus causing your lower half to fade
  from existence. You might see yourself as a disgusting
  monstrosity and develop traits to reflect that, or you might
  see yourself as a divine guardian and grow wings or glow
  faintly.
  At the start of each week after a period of forty days you
  must begin making wisdom checks to maintain your sanity
  based off of the chart below. Failure to make one of the saves
  below causes you to become a 'Ghost' and lose all sense of
  individuality you once had; forcing you to become a violent
  entity and haunt an area of importance to you.
  The number of weeks past 40 days
  DC needed to beat
  1
  5
  2
  12
  3
  19
  4
  26
  5
  Impossible to beat
  Additional Insights
  Barriers - Metal, stone, lead, and other heavy
  elementals are too difficult for you to pass through.
  Additionally, certain divine or arcane barriers
  typically found around churches or blessed
  grounds can halt you from entering and cause
  damage to your spiritual form.
  You're not alone - Certain creatures or spirits can
  and do exist within the spiritual realm. Most of
  them for the worst as many eventually lose
  themselves to their own thoughts and devolve into
  ruthless spirits. Some of these entities cannot be
  interacted with by creatures of the material realm,
  offering great danger to the wandering spirit who
  isn't prepared to stand alone.
  Revival - A wandering spirit can be placed back
  within their body if a reviving spell is cast on the
  body, so long as the spirit is willing. Upon being
  revived, they may make a DC 20 widsom check, if
  they succeed, they gain the memories of their
  spiritual lives, otherwise they do not.
  
SOURCE: textdata/thevault/Dungeons & Dragons [multi]/5th Edition (5e)/3rd Party/DMsGuild/Non-Publisher Titles/Life After Death - A way to Deal with Player Death.pdf