Swamp Naga

Cloud of Insects. A cloud of biting and stinging insects surrounds the swamp naga. A creature that starts its turn within 5 feet of the naga must make a DC 14 Constitution saving throw. On a failure, a creature takes 9 (2d8) poison damage and is poisoned for 1 minute. On a success, it takes half the damage and isn't poisoned. A poisoned creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. A wind of moderate or greater speed (at least 10 miles per hour) disperses the insect cloud for 1 minute. As a bonus action, the naga can disperse the cloud for 1 minute.

Rejuvenation. If it dies, the swamp naga returns to life in 1d6 days and regains all its hp. Only a wish spell or removing the naga from its swamp for 1 year can prevent this trait from functioning.

Insect and Serpent Passivism. No insects or serpents can willingly attack the swamp naga. They can be forced to do so through magical means.

Spellcasting. The swamp naga is an 8th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 14, +6 to hit with spell attacks), and it needs only verbal components to cast its spells. It knows the following sorcerer spells: Cantrips (at will): dancing lights, mage hand, message, poison spray 1st level (4 slots): charm person, fog cloud, silent image, sleep 2nd level (3 slots): blindness/deafness, hold person, suggestion 3rd level (3 slots): hypnotic pattern, stinking cloud, water breathing 4th level (2 slots): blight

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 17 (3d8 + 4) piercing damage plus 13 (3d8) poison damage.

Constrict. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 14 (3d6 + 4) bludgeoning damage, and the target is grappled (escape DC 14). Until this grapple ends, the target is restrained, and the naga can't constrict another target.