Giant Coral Snake

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (2d4 + 3) piercing damage, and the target must succeed on a DC 12 Constitution saving throw or be stunned until the end of its next turn. On a failed save, the target begins to hallucinate and is afflicted with a short-term madness effect (determined randomly or by the DM; see "Madness" in chapter 8 of the madness). The effect lasts 10 minutes.