Hitotsume Nyudo 一つ目入道
Large fey (shapechanger), chaotic neutral
Armor Class 15 (natural armor)
Hit Points 136 (16d10 + 48)
Speed 35 ft., climb 15 ft.
STR 20 (+5) · DEX 14 (+2) · CON 17 (+3) · INT 10 (+0) · WIS 15 (+2) · CHA 13 (+1)
Saving Throws Con +6, Wis +5
Skills Intimidation +4, Perception +6, Stealth +6
Damage Resistances psychic
Condition Immunities frightened (while concealed by fog)
Senses darkvision 60 ft., passive Perception 16
Languages Common, Sylvan, telepathy 60 ft.
Challenge 6 (2,300 XP)
Traits
Sudden Growth. When the nyudo enters combat, it immediately enlarges to Large size (included in its statistics). Each creature within 10 feet that can see the nyudo must succeed on a DC 15 Wisdom saving throw or be frightened until the end of its next turn.
Mist Meld. While in heavy mist, fog, or similar lightly/ heavily obscured terrain, the nyudo has advantage on Dexterity (Stealth) checks and on attack rolls, and opportunity attacks against it are made with disadvantage.
Poor Endurance. If the nyudo starts its turn with fewer than half its hit points, its speed is halved and it can’t take reactions.
Actions
Multiattack. The nyudo makes two Slam attacks.
Slam. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 18 (2d12 + 5) bludgeoning damage. If the target is Medium or smaller, it must succeed on a DC 16 Strength saving throw or be grappled (escape DC 16). While grappled this way, the target is restrained, and the nyudo can’t slam a different creature.
Crushing Grip. One creature grappled by the nyudo takes 21 (4d8 + 3) bludgeoning damage, and the grapple ends.
Frightful Glare (Recharge 5–6). The nyudo fixes its single eye on up to three creatures it can see within 30 feet. Each target must make a DC 15 Wisdom saving throw. On a failure, a target takes 22 (4d10) psychic damage and is frightened of the nyudo for 1 minute. A frightened creature can repeat the save at the end of each of its turns, ending the effect on itself on a success. On a successful save, a creature takes half the damage and isn’t frightened.
Bonus Actions
Step Through Fog. The nyudo teleports up to 30 feet to an unoccupied space it can see that is in mist, fog, or dim light.
Reactions
Mist Body (Recharge 4–6). When the nyudo is hit by an attack it can see, it turns to vapor, halves the attack’s damage against it, and immediately uses Step Through Fog.
LEGENDARY RESISTANCE (1/Day)
If the nyudo fails a saving throw, it can choose to succeed instead.
Legendary Resistance
If the nyudo fails a saving throw, it can choose to succeed instead.
Lore
A giant monk with a single eye who stalks wanderers in the fog.
Hitotsume Nyudo is regarded as one of the most dangerous yokai. He looks like an enormous Buddhist monk, but where a normal face should be there is only a single, huge eye centered in his forehead. Some stories give him the more formal name Hitotsume Dainyudo, “the Great One-Eyed Monk.” His appearances are always tied to remote mountains or forests, places where travelers find themselves far from any village.
Nyudo’s first hallmark is his size. At first he shows up as a man of average height, then in an instant shoots up to ten feet or more. His second trick is the way he blends into heavy mist; the fog lets him materialize out of nowhere, catching people off guard or even freezing them in place with terror. His garb—a monk’s robe and straw sandals—matches the strict canon of Buddhist ascetics, and the clash between this holy attire and the horror of meeting a yokai on the road pushes travelers’ fear to the limit.
From Yokai Bestiary 5E, Book Two, p. 38 · Fern Flower Press