Multiattack

The elemental makes two slam attacks.

Slam

Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 22 (4d8 + 4) bludgeoning damage.

Earths Embrace

Melee Weapon Attack: +7 to hit, reach 5 ft., one Large or smaller creature. Hit: 17 (2d12 + 4) bludgeoning damage and the target is grappled (escape DC 15). Until this grapple ends the elemental can't burrow or use Earths Embrace and its slam attacks are made with advantage against the grappled target.

Rock

Ranged Weapon Attack: +7 to hit, range 30/90 ft., one target. Hit: 15 (2d10 + 4) bludgeoning damage.