Multiattack

The elemental makes two slam attacks.

Slam

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (3d6 + 4) bludgeoning damage.

Whirlwind (Recharge 5-6)

The elemental takes the form of a whirlwind flies up to half of its fly speed without provoking opportunity attacks and then resumes its normal form. When a creature shares its space with the whirlwind for the first time during this movement that creature makes a DC 15 Strength saving throw. On a failure the creature is carried inside the elementals space until the whirlwind ends taking 3 (1d6) bludgeoning damage for each 10 feet it is carried and falls prone at the end of the movement. The whirlwind can carry one Large creature or up to four Medium or smaller creatures.