Storm Form. The elemental can move through a space as narrow as 1 inch wide without squeezing. A creature that touches the elemental or hits it with a melee attack while within 5 feet of it takes 3 (1d6) lightning damage and 3 (1d6) thunder damage. In addition, the elemental can enter a hostile creature's space and stop there. The first time it enters a creature's space on a turn, that creature takes 3 (1d6) lightning damage and 3 (1d6) thunder damage. Any creature that is within the elemental's space is deafened due to the roaring winds. Any creature that ends its turn in the elemental's space takes 3 (1d6) lightning damage and 3 (1d6) thunder damage.
Multiattack. The elemental makes two slam attacks.
Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 4) bludgeoning damage and 5 (1d8) thunder damage.
Lightning Bolt. The elemental creates a bolt of lightning which strikes at a point it can see within 100 feet. Each creature within 10 feet of that point must make a DC 14 Dexterity saving throw, taking 22 (5d8) lightning/thunder damage on a fail, and half as much on a success.
Description
No one knows how Storm Elementals originate. Whether they were Air Elementals turned to condensed fury and rage. Or if they are embodiments of actual storms. What is known is that they are a typhoon of lightning and thunder and anger.
Great design, some images I drafted for its use
Further description: The Storm Elemental's humanoid frame is sculpted from a constantly shifting mass of dark, ominous clouds, shot through with flashes of lightning that illuminate its form from within. Its eyes, resembling twin vortexes of swirling winds, glow with an eerie luminescence, reflecting the chaotic energy that courses through its being. Its movements are unpredictable and erratic, mirroring the capricious nature of a storm, capable of shifting from a gentle breeze to a raging tempest in an instant.