Storm Elemental, Lesser

Tempest 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 takes 7 (2d6) lightning damage. In addition, the storm 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 must make a DC 16 Constitution saving throw, taking 7 (2d6) lightning damage on a failure, half as much on a success. Any creature that ends its turn within the elemental's space must also make this saving throw.

Magic Weapons. The elemental's weapon attacks are magical.

Grounding. Lightning damage dealt by the elemental to earth elementals, or targets buried or burrowing in the ground is halved.

Multiattack. The elemental makes two melee attacks and can use Blinding Thunder.

Slam. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 11 (2d6 + 4) bludgeoning damage plus 4  (1d6) thunder damage.

Shock. Melee Weapon Attack: +8 to hit, reach 0 ft., one target. Hit: 18 (5d6) lightning damage. This attack has advantage against a target wearing metal armor.

Blinding Thunder. Each creature in the elemental’s space must succeed on a DC 16 Constitution saving throw or become blinded and deafened until the end of the elemental’s next turn.

Thunder Pulse. The elemental chooses a direction, then pushes unsecured objects within its space that aren't being worn or carried 30 feet in that direction. Each creature in the elemental's space must make a DC 13 Constitution saving throw or take 11  (2d6 + 4) bludgeoning damage plus 11  (3d6) thunder damage, is knocked prone, and is pushed 30 feet in that direction.

Vortex (Recharge 6). The elemental pulls all unsecured objects within 30 feet of it that isn't being worn or carried up to 30 feet closer to the center of its space. Each creature within 30 feet of the elemental must make a DC 13 Strength saving throw. On a failure, a target takes 22 (5d6 + 4) bludgeoning damage, is knocked prone, and is pulled up to 30 feet toward the center of the elemental's space.