The Divine Ring Descends: The Strongest Otherworld

When darkness invades the city, zillions of human warriors come into being, but Aiden isn't one of them. One day, he comes across a mysterious ring and is sent into the Orc Realm where humans are forbidden, by a treaty. He magically survives his execution, lifts the Orc Tribe's sacred hammer, and becomes the tribe leader. Just then, he is transported back to his original reality.

(Source: WebComics)