Acid Storm is a generic combat spell available at Evocation 7. Casting it requires water 44fire 11 and consumes 3watergem. It is a battlefield enchantment.

Acid storm hits approximately 5% of the battlefield each turn with 4 armor piercing acid damage every round until the caster dies, leaves the battlefield, or the battle is over. The acid damage can cause rusting of iron armour and weapons, which provides a chance of them breaking when damaged.

Notable Spells
rituals Personal Enchantments divine-name/gift-of-reason • transformation • twiceborn • cure-disease
Strategic domes • globals • magic-phase-movement • remote-attacks
Summons cross-breeding • elemental-royalty • Hidden Underneath/in Snow/in Sand • infernal-breeding • reanimation • release-lord-of-civilization • ritual-of-rebirth • tartarian-gate
Other wish
combat-magic Battlefield Enchantments
Buffs hell-power • life-after-death • mossbody • pain-transfer • phoenix-pyre • returning • soul-vortex • strength-of-giants • time-stop
Debuffs armor-of-achilles • earth-grip • false-fetters
Direct Damage divine-magic • magic-duel • soul-slay
Summons reanimation
Other communions • enslave-mind