This blowgun has 7 charges. When you attack with it, you may expend a charge to deal an additional 4d4 acid damage immediately and 2d4 acid damage at the end of the target's next turn. On a miss, the dart splashes the target with acid for half as much of the initial damage and no damage at the end of its next turn.
At dawn, the blowgun regains 1d4+2 expended charges. If you expend the last charge, roll a d20. On a roll of 1, the blowgun is destroyed.