Selang

Poisoned Weapons. The selang's weapons are coated with a magical poison. When the selang hits with any weapon, the weapon deals an extra 3d6 poison damage (included in the attack).

Multiattack. The selang can use its Alien Piping. It then makes two Dagger or Poison Bolt attacks.

Dagger. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 6 (1d4 + 4) piercing damage plus 10 (3d6) poison damage.

Poison Bolt. Ranged Spell Attack: +6 to hit, range 60 ft., one target. Hit: 14 (3d6 + 4) poison damage.

Alien Piping. The selang plays one of the following ear-bending melodies on alien pipes. One creature the selang can see within 60 feet of it is the only creature that can hear the melody. The target must succeed on a DC 14 Wisdom saving throw or be affected by the chosen melody.