Shadow Witch (5e Creature)
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Medium undead, chaotic evil
Skills Stealth +4 (+6 in dim light or darkness)
Amorphous. The shadow can move through a space as narrow as 1 inch wide without squeezing.
Innate Spellcasting. The shadow's spellcasting ability is Charisma (spell save DC 13, +5 to hit with spell attacks). It can innately cast the following spells, requiring no material components:
Shadow Stealth. While in dim light or darkness, the shadow can take the Hide action as a bonus action.
Sunlight Weakness. While in sunlight, the shadow has disadvantage on attack rolls, ability checks, and saving throws.
Strength Drain. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 9 (2d6 + 2) necrotic damage, and the target's Strength score is reduced by 1d4. The target dies if this reduces its Strength to 0. Otherwise, the reduction lasts until the target finishes a short or long rest.
Like normal shadows, shadow witches live from the shadows and drain the vitality of those untainted by evil. As a shadow witch drains the vitality from a humanoid its own shadow begins to move of its own accord and when it dies the shadow rises from the grave and becomes a new shadow itself. When a spellcaster dies to a shadow, occasionally, it becomes a shadow witch instead of an ordinary shadow.
Undead Nature. A shadow witch doesn't require air, food, drink, or sleep.