Multiattack

The sand spider makes one Bite attack and two Impaling Leg attacks.

Bite

Melee Weapon Attack: +8 to hit, reach 5 ft., one creature. Hit: 10 (1d10 + 5) piercing damage plus 10 (3d6) poison damage.

Impaling Leg

Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 12 (2d6 + 5) piercing damage. If the target is a Medium or smaller creature, it must succeed on a DC 16 Strength saving throw or be grappled (escape DC 16). Until this grapple ends, the target is restrained and takes 7 (2d6) piercing damage at the start of each of its turns, and the sand spider can't use the same Impaling Leg on another target. The sand spider has four Impaling Legs.