Corrosion deals 9-21 damage to all enemies on-screen, and then deals continuous damage to them for a period of time, inflict 4-10 damage every 2 seconds.
Corrosion is of little use, the major problem being that its damage does not increase as it levels up, and the damage it does is minimal. However, it does have a niche use in that it is the only alchemy formula the player gets that affects all enemies on-screen, while other formulas can only target up to three enemies. This makes Corrosion useful when facing multiple weak enemies.
Acid Rain - Atlas - Barrier - Call Up - Corrosion - Crush - Cure - Defend - Double Drain - Drain - Energize - Escape - Explosion - Fireball - Fire Power - Flash - Hard Ball - Heal - Lance - Laser - Levitate - Lightning Storm - Miracle Cure - Nitro - One Up - Reflect - Regrowth - Revealer - Revive - Slow Burn - Speed - Sting - Stop - Super Heal