If a player is slain by a wraith, barrow wight or Nazgul, the player rises from the grave as a wraith rather than a traditional ghost. In future encounters with their bones pile you will have to contend with the tougher spirit of the former player.
Eating a wraith corpse can be tempting, but be aware that an oversatiated character can still choke on them even though they provide zero nutrition.
Sometimes (one out of seven times, to be exact), the corpse will "rot away completely" and provide no experience - dipping it in holy water has no effect on this probability. It isn't possible to tin wraith corpses, but they can be kept fresh in an ice box.
Wraiths (indeed, all undead) killed on a level with a graveyard are much less likely to leave a corpse (1/9 of the normal 50% chance if killed by you, or 1/3 of the normal chance if killed by anything else). To get around this, a player may lure the wraith up or down a stairway before dispatching it, or branch-/level teleport while the wraith is adjacent. Alternatively, graveyard wraiths can be saved for a pet purple worm; their engulfing attack is not subject to corpse-leaving odds. Polymorphed players do not gain levels from swallowing live wraiths, though.
Either magic cancellation level 3 or drain resistance is highly recommended for a player transporting wraiths. Magic cancellation will not completely prevent level drain, but decreases the odds of being drained of a second level before one can gain a single experience point (eg by killing the wraith) and regain a single drained level.
SLASH'EM's wraith corpses have a different effect if eaten; they are as follows
|10%||You lose experience.||"You feel that was a bad idea."|
|10%||Your maximum HP and Pw decreases.||"You don't feel so good ..."|
|20%||Nothing happens.||"You feel something strange for a moment."|
|10%||Your maximum HP and Pw increases.||"You feel physically and mentally stronger!"|
|50%||You gain experience.||"You feel that was a smart thing to do."|
In this form, wraiths originate from Dungeons and Dragons.
They appear incorporeal, with a hooded robe and glowing red eyes. The name comes from Scottish, meaning ghost.
Immediately, though everything else remained as before, dim
and dark, the shapes became terribly clear. He was able to
see beneath their black wrappings. There were five tall
figures: two standing on the lip of the dell, three advancing.
In their white faces burned keen and merciless eyes; under
their mantles were long grey robes; upon their grey hairs
were helms of silver; in their haggard hands were swords of
steel. Their eyes fell on him and pierced him, as they
rushed towards him. Desperate, he drew his own sword, and
it seemed to him that it flickered red, as if it was a
firebrand. Two of the figures halted. The third was taller
than the others: his hair was long and gleaming and on his
helm was a crown. In one hand he held a long sword, and in
the other a knife; both the knife and the hand that held it
glowed with a pale light. He sprang forward and bore down
- end.c in NetHack 3.4.3, line 229: players killed by a W rise as a wraith