As two actions, you can create this bomb. As an action, a creature can throw this bomb at a point within 5 meters, where it explodes on impact. A cloud of acidic fog spreads to fill a sphere for the duration. The sphere spreads around corners, and its area is heavily obscured. It lasts for the duration or until a wind of moderate or greater speed (at least 15 kilometers per hour) disperses it.
A creature that enters the area for the first time on a turn or starts its turn there must make a Fortitude saving throw.
On a failed save, a creature takes 3d4 acid damage immediately and additional acid damage equal to half the amount of acid damage dealt at the end of its next turn.
On a successful save, a creature takes half the initial damage and no damage at the end of its next turn.
Creatures are affected even if they hold their breath or don’t need to breathe.
The acid slowly eat through objects, creating holes in surfaces, destroying nonmagical items, or dissolving bodies. It takes 1 minute to dissolve nonmagical organic materials such as cloth, plants, or rope, 10 minutes to dissolve wood, and 30 minutes to dissolve bodies and metal.
You can increase the damage by 1d4 for every two additional catalyst expended.
You can expend 1 additional mana so duration changes to 1 hour/catalyst.