As an action, make a weapon attack.
On a hit, add 1d10 + your spellcasting ability acid damage to the attack’s damage roll and the target takes additional acid damage equal to half the amount of acid damage dealt at the end of its next turn and its armor or natural armor is corroded 1 until the end of your next turn.
On a critical hit, add twice as much damage.
On a miss by 4 or less, add half as much damage.
You can increase the damage by 2d10 for each additional mana expended.