Druids of the Circle of Corrosion see themselves as arbiters of civilization's use of natural resources. They often hold meetings on the fringes of the frontier rather deep in the woods, close to keep an eye on the growing spread of civilization, ready to fight back if they deem that the city will harm the ecology and recourses of the land. They wield the power of acid to bring crafted materials back to their natural states as minerals and metals, a power that they reserve for only those that they deem unworthy to wield nature's gifts.

Corrosive Ire

At 2nd level, you gain the ability to magically corrode away the manufactured products of society. As a bonus action you can mark a manufactured object that you can see for corrosion. The target object must be non-magical, no more than 10 feet long on a side, and be within 15 feet of you. When you first target the object, and at the start of each of your next turns while a target of your corrosive ire, the object takes 1d10 acid damage.

If the targeted object contains a complicated mechanism, such as a clockwork device or a lock, the mechanism no longer functions when it first takes the acid damage.

If the targeted object is a weapon, it does not take acid damage, instead the weapon takes a permanent and cumulative -1 penalty to damage rolls at the start of each of your turns. If its penalty drops to -5, the weapon is destroyed.

If the targeted object is either armor or a shield, it does not take acid damage, instead it takes a permanent and cumulative -1 penalty to the AC it offers at the start of each of your turns. Armor reduced to an AC of 10 or a shield that drops to a +0 bonus is destroyed.

If the targeted object is being worn or carried, the creature that possesses it can attempt to resist the effect. If it does, it makes a Dexterity saving through against your spell save DC. On a success, the object does not become a target of your corrosive ire.

The corrosive ire lasts for 1 minute, or until you are separated from the object by more than 15 feet. Once you use this feature, you can't use it again until you take a short or long rest.