Clockwork Naga

Overclock. The construct can overcharge its systems, granting it an additional attack when it makes an Attack action on its turn. After using this ability, the creature must wait 1d4 turn before using it again.

Rewind. When the construct is reduced to 0 hit points, roll an unmodified d20. The DC is equal to 11 + 1d4; on a success, the construct reanimates, regaining 2d4 +2 hit points. This ability cannot be used if the creature was killed by a critical hit or a Dispel Magic spell.

Coil. As an action, the creature can attempt to grab and constrict an enemy with its tail. Make a melee attack roll, +2 to hit. On a hit, the target takes 2d4 bludgeoning damage and becomes Grappled. The construct has advantage on Bite attacks against a grappled target, but cannot make weapon attacks towards it. Weapons attacks against other creatures while grappling are made with disadvantage.

Glaive. Melee Weapon Attack: +2 to hit, reach 10 ft., one target. Hit: 4 (1d10+1) slashing damage.

Shortbow. Ranged Weapon Attack: +2 to hit, reach 60 ft., one target. Hit: 4 (1d6+2) piercing damage.

Bite Melee Weapon Attack: +2 to hit, reach 5ft., one target. Hit: 3 (1d4+1`) piercing damage.

Constrict. If the naga has a creature grappled with its Coil ability, it can tighten it's grip as a bonus action, dealing 1d4 bludgeoning damage instantly.