Dust Lich (5e Creature)
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Medium undead, any evil alignment
Saving Throws Con +6, Int +10, Wis +6
Amorphous. The lich can move through a space as narrow as 1 inch wide without squeezing.
Legendary Resistance (3/Day). If the lich fails a saving throw, it can choose to succeed instead.
Cantrips (at will): mage hand, prestidigitation, ray of frost
Turn Resistance. The lich has advantage on saving throws against any effect that turns undead.
Touch. Melee Spell Attack: +10 to hit, reach 5 ft., one target. Hit: 9 (2d8) necrotic damage.
The lich can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The lich regains spent legendary actions at the start of its turn.
Cantrip. The lich casts a cantrip.
When a would-be lich incorrectly performs the ritual to become a lich, death usually follows, but for some this death is restless. These souls are dust liches, failed liches that nonetheless burn with arcane power.
Failed Liches. Because the rituals that bind a dust lich are incomplete, it lacks a phylactery. As such, destruction means permanent death to a dust lich, so it will attempt to flee from any engagement where it seems outmatched, ready to plot revenge. At the same time, a dust lich need not concern itself with feeding souls to a phylactery, so it can linger in the most desolate and secluded places without fear of becoming a demilich.
Dust to Dust. The chosen abode of a dust lich is rife with undead, though dust liches have a particular preference for spectral undead such as wraiths and ghosts. Some dust liches inhabit the lairs of more powerful undead, whether by choice or by force, and a true lich or powerful necromancer may keep one or more dust liches as guardians. Powerful spellcasters versed in dark magic and necromancy know of rituals to summon and bind dust liches to their service, and some legends even speak of rituals meant to transform dust liches into true liches.
Undead Nature. A dust lich doesn't require air, food, drink, or sleep.