Shadow Assassin

Medium undead, chaotic evil

Armor Class 14

Hit Points 78 (12d8 + 24)

Speed 40 ft.

Saving Throws Dex +8, Int +5

Skills Perception +9, Stealth +12

Damage Vulnerabilities radiant

Damage Resistances acid, cold, fire, lightning, thunder; bludgeoning, piercing, and slashing from nonmagical attacks

Damage Immunities necrotic, poison

Condition Immunities exhaustion, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained

Senses darkvision 60 ft., passive Perception 19

Languages understands the languages it knew in life but can’t speak

Challenge 9 (5,000 XP)

Amorphous. The assassin can move through a space as narrow as 1 inch wide without squeezing.

Shadow Stealth. While in dim light or darkness, the assassin can take the Hide action as a bonus action.

Sunlight Weakness. While in sunlight, the assassin has disadvantage on attack rolls, ability checks, and saving throws.

Actions

Multiattack. The assassin makes two Shadow Blade attacks.

Shadow Blade. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) piercing damage plus 10 (3d6) necrotic damage. Unless the target is immune to necrotic damage, the target’s Strength score is reduced by 1d4 each time it is hit by this attack. The target dies if its Strength is reduced to 0. The reduction lasts until the target finishes a short or long rest.

If a non-evil humanoid dies from this attack, a shadow (see the Monster Manual) rises from the corpse 1d4 hours later.