Blockbird

Psychic Ignorance. The Blockbird has advantage on Wisdom saving throws and is immune to psychic damage and being charmed.

Psyonic Evolution. Can communicate telepathically with any other Blockbird it has seen.

Darkvision. The creature can see in dim light within 120ft as if it were bright light, and in darkness as if it were dim light. The creature can't discern color in darkness, only shades of gray.

Beak - Peck. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: (1d6) bludgeoning damage.

Beak - Bite. Melee Weapon Attack: +1 to hit, reach 5 ft., one target. Hit: (1d4) piercing damage.

Mind Peck.  Creature drives a disorienting spike of psychic energy into the mind of one creature you can see within range. The target must succeed on a DC 10 wisdom saving throw or take (1d6) psychic damage and subtract (1d4) from the next saving throw it makes before the end of this creature's next turn.

Uncanny Stare.  Creature stares into the eyes of one creature that can see it in range, making the creature incredibly uncomfortable from the Blockbird's uncanny puppet-like appearance. The target must succeed on a DC 10 wisdom saving throw or become frightened of the Blockbird.