516 Anything Beneath the Sun Can Be a Sword!

The Black Sea Plains was vast but desolated. It was once the bottom of the ocean where remains of endless creatures accumulated over billions of years, before it became the cracked and barren gray-black land as the sea dried. However, there were searing vapors which, mixed with subterranean sulfur, ejected out intermittently from the fissures over the withered land. It slowly rose from the depths, and mingled with the particles amidst the clouds into turbid acid and plummeted as rain.

That ever-present acid rain was capable of eroding steel and melting stone. But now, a black-colored armor was advancing under it in great clamor.

It was a demon army.