Corruptor's Acid Gauntlet

You evoke a gauntlet of black acid upon your free hand. The gauntlet is similar in size and shape to a knight's, and it lasts for the duration. You may will it to disappear, but you can evoke it again as a Bonus Action.

As a Magic action, you can make a melee spell attack with the acidic gauntlet. On a hit, the target takes Acid damage equal to 6d6 plus your spellcasting ability modifier.

The acidic gauntlet leaves acid upon the target after each successful hit. The target suffers a permanent -1 to their AC if they are wearing armor, otherwise they take an additional 2d6 damage until they spend an action or bonus action to somehow remove the acid.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 5.