Second season of Wangu Xian Qiong.

The World as we know it has been torn apart shattered by a series of natural disasters that have turned civilization into a brutish nightmare of survival and has left whole cities buried beneath the Earth. It's now a lethal and chaotic place, a place where only the strongest and most savage remain alive. The strongest of them all is a giant warrior known as Violence Jack… Violence Jack tries to avert a civil war brewing among the wretched inhabitants of a subterranean metropolis called Evil Town. Based on a character created by manga horror specialist, Go Nagai. (Source: AniDB)

Second season of Mahou Shoujo Nante Mou Ii Desukara.

Spinoff based on the Nintendo DS RPG game by SEGA, released in Japan July, 2008. In a world where humans serve as livestock for the ruling beastman, and where sand fills the roles of water and fire. Kyrie is recruited by the "World Destruction Committee" to assist in putting an end to their world. Kyrie alone holds the power needed to do it.