Sting - Scorpion

Monster Manual - 5e, D&D Basic Rules

Sting. Melee Weapon Attack: +2 to hit, reach 5 ft., one creature. Hit: 1 piercing damage, and the target must make a DC 9 Constitution saving throws, taking 4 ( 1d8 ) poison damage on a failed save, or half as much damage on a successful one.