Ningyo 2014
CR 7 aberration
Small aberration, neutral evil
The ningyo can breathe only underwater and can hold its breath for 1 hour.
When a creature that the ningyo can see attacks the ningyo and misses, the attack is automatically redirected against another creature within 5 feet of the ningyo or the attacker. This attack uses the same attack roll.
Actions
The ningyo makes four barbed tentacle attacks.
Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d6 + 5) piercing damage plus 5 (1d10) poison damage.
Reactions
When the ningyo takes damage, it can choose to take half the damage instead. The ningyo then chooses a creature within 60 feet. The target must succeed on a DC 15 Constitution saving throw or have disadvantage until the end of its next turn as it is wracked with the pain of the attack.
Source: Creature Codex (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details