Using your bonus action you imbue you weapon with caustic power. The next time you hit with a melee attack the target takes an additional 1d6 Acid Damage and 1d4 Acid Damage at the beginning of their next turn. Once you hit with this spell, its effects end on the weapon; a single weapon can only be affected by this spell once at a given time.

At Higher Levels. When you cast this spell at 2nd level or higher the damage increases by 1d6 during the attack and 1d4 at the beginning of each turn.