Acid Bomb
By mixing your Bomb’s explosive contents with a few drops of ardenflotic acid, a highly corrosive chemical, you can change it into an Acid Bomb. This Bomb deals Acid damage instead of Fire damage and all of its damage dice are d8s. A target hit by this Bomb or that fails its saving throw against it has a -3 penalty to its AC until the start of your next turn.
Sources
Valda’s Spire of Secrets (2024)