All Around Vision. The Yaksha statue has advantage on saving throws against being blinded, and cannot be surprised while it is conscious.

False Appearance. While the Yaksha statue remains motionless, it is indistinguishable from a normal statue.

Immutable Form. The Yaksha statue is immune to any spell or effect that would alter its form.

Magic Resistance. The Yaksha statue has advantage on saving throws against spells and other magical effects.

Magic Weapons. The Yaksha statue’s weapon attacks are magical.

Multiattack. The Yaksha statue makes four stone falchion attacks.

Stone Falchion. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 13 (2d6 + 6) slashing damage. 

Innate Spellcasting . The Yaksha statue's innate spellcasting ability is Wisdom (spell save DC 15, +7 to hit with spell attacks). It can innately cast the following spells:

At will: cloud of daggers (at 4th level)

1/Day: dispel magic (Justice only), passwall, stone shape

Change Face. The Yaksha statue changes which expression is facing forward from Justice, Sorrow, or Vengeance. Roll a d6 to determine which expression is chosen. On a roll of 1-2, Justice is the forward expression. On a roll of 3-4, Sorrow is the forward facing expression. On a roll of 5-6, Vengeance is the forward facing expression.

War's Despair (Recharge 6) (Sorrow only). The Yaksha statue emits a grayish-blue cloud of billowing gas out to a distance of 30 feet from it. Each creature within range must make a DC 15 Constitution saving throw. On a failed save, the creature is knocked unconscious for 1 minute, or until it takes any damage.

Swift Enchant (Recharge 6). The Yaksha statue makes one weapon attack against a creature that leaves its reach. This does not use the Yaksha statue's reaction for the round.

Disrupt Invocation (Recharge 6) (Justice only). The Yaksha statue attempts to interrupt a creature that it sees attempting to cast a spell. The creature must succeed on a DC15 Wisdom saving throw or fail casting the spell, wasting the spell slot.

Retaliate (Recharge 6) (Vengeance only). The Yaksha statue makes an opportunity attack against a creature that hits it with a melee attack. If this attack hits, the creature is stunned until the end of the Yaksha statue's next turn.