Acid Poison

You can throw droplets of acid poison which burns through skin and stone alike, as well as causing effects of poisoning at anyone within range. The target must make a constitution saving throw or take 1d8 acid damage and 1d10 poison damage. A successful con saving throw means the target takes half damage. If this attack is made and rolls lower than the target's AC, the target takes 1d4 points of damage on their armour.

This increases by 1d8 and 1d10 respectively at fifth, eleventh and seventeenth levels.