Multiattack

The water elemental makes two Water Tendril or Water Bolt attacks. If both Water Tendril attacks hit one creature, it can use Whelm on the target, if available.

Water Tendril

_Melee Weapon Attack:_ +7 to hit, reach 10 ft., one target. _Hit:_ 17 (3d8+4) bludgeoning damage, and the target is grappled (escape DC 15) if it is Large or smaller. The water elemental can have up to three targets grappled at a time.

Water Bolt

_Ranged Weapon Attack:_ +5 to hit, range 30/120 ft., one target. _Hit:_ 16 (4d6+2) bludgeoning damage.

Whelm (Recharge 4-6)

The water elemental envelops one creature it is grappling, and the grapple ends. While enveloped, the target is restrained, unable to breathe unless it can breathe water, can't be hit by the elemental's Water Tendril, and it takes 9 (2d8) bludgeoning damage at the start of each of the elemental's turns.<br>When the elemental moves, the enveloped creature moves with it. The elemental can have only one creature enveloped at a time. A creature within 5 feet of the elemental, including the target, can take its action to free the target from the elemental by succeeding on a DC 15 STR check.