Multiattack

The scorpion attacks once with its claws and once with its sting.

Claws

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 9 (2d6+2) bludgeoning damage and the target is grappled (escape DC 12). Until this grapple ends the scorpion can't attack a different target with its claws.

Sting

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8+2) piercing damage and the target makes a DC 12 Constitution saving throw taking 16 (3d10) poison damage on a failure or half damage on a success.