Wounded Fury. While it has 10 hit points or fewer, the quaggoth has advantage on attack rolls. In addition, it deals an extra 7 (2d6) damage to any target it hits with a melee attack.
Innate Spellcasting (Psionics). The quaggoth's innate spellcasting ability is Wisdom (spell save DC 11). The quaggoth can innately cast the following spells, requiring no components:
At will: feather fall, mage hand (the hand is invisible)
1/day each: cure wounds, enlarge/reduce, heat metal, mirror image
Multiattack. The quaggoth makes two claw attacks.
Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:6 (1d6 + 3) slashing damage.
Savage and territorial, quaggoths climb the chasms of the Underdark. They maul their foes in a frenzy, becoming even more murderous in the face of death.