Speed burst: By lowering their body to the ground and propelling themselves with their arms, Naga can move more quickly for a time. As a bonus action on their turn, if they have both hands free, they can increase their walking speed by 5 feet until the end of their turn.

Natural weapon: Naga's constricting serpentine body is a natural weapons, which they can use to make unarmed strikes. If they hit with their constrict attack, they deal bludgeoning damage equal to 1d6 + Strength modifier, and the target is grappled (escape DC 8 + proficiency bonus + Strength modifier). Until this grapple ends, the target is restrained, and they can’t constrict another target.

Poison immunity: Naga are immune to poison damage and can’t be poisoned.

Poison affinity: Naga gain proficiency with the poisoner’s kit.

Crushing coils: When a creature is restrained by a Boakin's Constrict, it takes 1d6 bludgeoning damage at the start of each of its turns.

Enduring scales: Boakin have advantage on saving throws against being knocked prone or moved against their will.

Stonehold grip: A Python's body coils like steel cables, unrelenting and massive. They count as one size larger when determining their carrying capacity and what they can push, drag, or lift. They can grapple Huge creatures. While grappling, they are considered to have half cover against all attacks not made by the grappled target.