Ocean's Wrath
The Spell known as Ocean's Wrath is a conjugation in which 5 casters create a magical ball of sulfuric acid. This is done by combining 6 parts air to 1 part sulfur. Alternatively, water sources can be used to greatly improve the speed of formation. The radius of the ball varies depending on distance between the casters and time spent, but lower averages 6 feet radii when using air. Once formed, the casters lob it at the foe in an arc, and once it hits the ground it bursts apart, melting anything caught by it's viscous nature, often sticking to people and eating into them. While fairly slow moving and taking time to form, it's nature makes it hard to disrupt, The result is soluble allowing larger amounts to be scaled upward easily in water-rich areas if you don't mind diluting the power for more liquid.
More specifically for the formation, it's 4 parts Oxygen, 2 parts Hydrogen, 1 part Sulfur. We use magically infused sulfur crystals made in the forge of cleansing(themselves made sulfur bought on the market using 1 Wealth Token) as the catalyst, with them having a small part of the forge's magic within them. Tiny grains which can be used to draw out the nessaceery parts of air during condensation. Or at least that's what Muu tries to explain, the specifics can be iffy in Angel to Mortal translations. Water already has the nessaceery parts in it, meaning combining the sulfur crystals in is far easier.