Sting - Giant Scorpion

Monster Manual - 5e, D&D Basic Rules

Sting. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 3 ( 1d4 + 2 ) piercing damage, and the target must make a DC 12 Constitution saving throws, taking 22 ( 4d10 ) poison damage on a failed save, or half as much damage on a successful one.