These gloves are black and contain an engraved skeleton hand.  You must be attuned to these gloves to gain the following benefits:  

• You have resistance to necrotic damage while you wear the gloves on your hands.  
• The gloves have 12 charges.  Your unarmed strikes deal an extra (1d10) necrotic damage on a hit.  You can deal extra necrotic damage by expending charges.  Each charge you expend (to a maximum of 4), increases the necrotic damage by (1d10).  Necrotic damage dealt with this ability ignores resistance to necrotic damage.  In addition, if you spend charges to deal extra necrotic damage, the target can't regain hit points until the start of its next turn.     
• Any creature currently touching you or grappled by you takes (1d6) necrotic damage at the start of its turns.  

The gloves regain (1d8 + 4) charges at the end of a long rest.  

Curse.  Once you attune to these gloves, they can't be removed.  At the end of every long rest, you must make a DC 17 Constitution saving throw again or suffer one level of exhaustion.  Also on a failed save, your hit point maximum is reduced by 5 (1d10), as well as your current hit points.  A greater restoration reduces the exhaustion level by one.  This exhaustion can't be removed by other means while the curse remains.  If a creature succeeds on the Constitution save made to resist the effects of the curse, the DC increases by 5.  The save DC resets to 17 if the creature fails a saving throw against this effect.  If the cursed creature dies, it rises up as a bodak in 1 hour.  A remove curse or greater restoration spell ends the effects of the curse and allows the gloves to be removed, though it does not remove any levels of exhaustion.  However, once the curse is removed, a creature's exhaustion level can be removed normally, and the creature's reduction to its hit point maximum is ended.  The gloves remain cursed, but once the curse is removed, the creature can remove the gloves so they can be safely disposed of.   

A creature killed while cursed by the gloves gets its soul devoured by the gloves.  The creature can only be returned to life by a true resurrection or wish spell.  A wraith appears directly above the gloves in 2d6 hours.  Immediately after the cursed creature dies while wearing the gloves, a wave of necrotic energy sweeps across the land.  Each creature in a 300-ft. sphere originating from the gloves much make a DC 20 Constitution saving throw, taking (7d10) necrotic damage on a failed save, or half as much damage on a successful one.  Plants in the radius become withered and blackened, while food becomes spoiled and water becomes undrinkable.  A creature killed by this effect rises up as a corpereal undead determined by the DM.  The souls of any living creatures that die from this effect become will o' wisps.     

While cursed by these gloves, a creature takes a -1 penalty to all ability checks, attack rolls, and saving throws per level of exhaustion.