Actions

Multi-attack. The stalker can use its Enrapturing Glow if it can. It then makes two bite attacks.   Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) piercing damage.   Enrapturing Glow (Recharge 5-6). The stalker's body patterns begin to glow in an enticing manner, creating bright light in a 10-foot radius and dim light for an additional 10 feet. All creatures within 30 feet of the stalker that can see the light must succeed on a DC 14 Wisdom saving throw or move up to 20 feet directly towards the stalker.   Lightning Strike (Recharge 5-6). The Monstrosity hurls a magical lightning bolt at a point it can see within 150 feet of it. Each creature within 10 feet of that point must make a DC 14 Dexterity saving throw, taking 34 (10d8) lightning damage on a failed save, or half as much damage on a successful one.

Regional Effects

it is said when an Undertow King Stalker emerges a storm shall follow. Due to the creatures large size and innate electrical properties, it unknowingly creates a lightning storm due to the sudden change in the atmospheres electrical charge and waves as it emerges to the seas surface

Suggested Environments

wide vast deep seas, along heavy ship travel paths