Armor Class 14
Hit Points 71 (13d8 + 13)
Speed 40 ft., climb 40 ft.
Saving Throws DEX +7, CON +4
Skills Stealth +7
Damage Resistances cold
Damage Immunities psychic
Condition Immunities charmed, frightened, prone
Senses darkvision 60 ft., passive Perception 11
Languages Deep Speech
Challenge 5
Ambusher. The mangler has advantage on initiative rolls.
Multiattack. The mangler makes two Claw attacks.
Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage. If the attack roll has advantage, the target also takes 7 (2d6) psychic damage.
Flurry of Claws (Recharge 5–6). The mangler makes six Claw attacks. Either before or after these attacks, it can move up to its speed without provoking opportunity attacks.
Shadow Stealth. While in dim light or darkness, the mangler takes the Hide action.
Mordenkainen Presents: Monsters of the Multiverse, p. 229