Small fey, neutral evil
Armor Class 14 (natural armor)
Hit Points 33 (6d6 + 12)
Skills Intimidation +6, Stealth +5
Condition Immunities charmed, frightened
Senses darkvision 60 ft., passive Perception 12
Languages Common, Sylvan
Challenge 3 (700 XP)
Glare of Terror. When a creature that can see the mumus’ eyes starts its turn within 30 ft. of the mumus, the mumus can force it to make a DC 14 Wisdom saving throw if the mumus isn’t incapacitated and can see the creature. On a failed save, a creature that fails the save is frightened of the mumus for 1 minute. If the saving throw fails by 5 or more, the creature is instantly paralyzed in addition to being frightened of the mumus for 1 minute. The creature can repeat the saving throw at the end of each of its turns to end the effect on a success.
Magic Resistance. The mumus has advantage on saving throws against spells and other magical effects.
Syphon Terror. The mumus has advantage on its melee attack rolls against frightened creatures and regains 3 (1d6) hit points at the start of its turn for every frightened creature within 60 feet of it.
Multiattack. The mumus makes three attacks, one with its bite and two with its claws.
Bite. Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 5 (1d4 + 3) piercing damage.
Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: (1d4 + 3) slashing damage.
Invisibility. As a bonus action, the mumus magically turns invisible until it attacks, or until its concentration ends (as if concentrating on a spell). Any equipment the mumus wears or carries is invisible with it.
Conjure One’s Worst Fear. As an action, a mumus can cause a frightened creature, that is also paralyzed as a result of the mumus’ glare of terror feature, to visualise its worst fear, which is only visible to that creature. The target must make a DC 14 Wisdom saving throw. On a failed save, the target creature is reduced to 0 hit points. On a successful save, the target creature takes 2d10 psychic damage.