Cable Gnawer

Live Conduit.
Electricity courses through the Cable Gnawer’s tail. A creature that hits it with a melee attack while within 5 feet takes 3 (1d6) lightning damage.

Cable Sense.
While touching metal structures, wiring, or conductive surfaces, the Cable Gnawer has advantage on Perception checks and cannot be surprised.

Predatory Current.
If the Cable Gnawer deals lightning damage to a creature, that creature’s speed is reduced by 10 feet until the end of its next turn.

Fray and Feed.
When the Cable Gnawer reduces a creature to 0 hit points with its Bite, it regains 10 hit points.

Multiattack.
The Cable Gnawer makes one Bite and one Voltage Lash attack.

Bite.
Melee Weapon Attack: +5 to hit, reach 5 ft., one target.
Hit: 11 (1d10 + 3 plus 1d6) piercing damage. If the target is grappled or its speed is reduced, the attack deals an extra 4 (1d8) lightning damage.

Voltage Lash.
Melee Weapon Attack: +5 to hit, reach 15 ft., one target.
Hit: 9 (1d8 + 3) bludgeoning damage plus 5 (1d10) lightning damage. The target must succeed on a DC 13 Constitution saving throw or be jolted, granting advantage on the Cable Gnawer’s next attack against it before the end of the Gnawer’s next turn.

Overload Snap (Recharge 5–6).
The Cable Gnawer whips its tail into the ground or a conductive surface, releasing a surge. Creatures within 10 feet must make a DC 13 Dexterity saving throw, taking 14 (4d6) lightning damage on a failure, or half as much on a success. Conductive surfaces remain charged until the end of the Gnawer’s next turn; creatures moving across them take 3 (1d6) lightning damage.

Skitter Through Lines.
If the Cable Gnawer is touching a conductive surface, it moves up to 20 feet without provoking opportunity attacks.