Second season of Xing Chen Bian.

In this prequel movie to the Slayers televison series, Lina Inverse travels to Mipross Island with her rival/traveling companion Naga the Serpent. While they originally came for the hot springs, they soon find them selves mixed up in a conspiracy involving a mazoku named Joyrock. Years ago, he killed all of the elves that inhabited the island and absorbed their power. They are soon joined by an old mage named Rowdy Gabriev, who was in love with one of the elves slaughtered and also wants to defeat Joyrock. 

(Source: ANN)

In the distant future, humanity has explored beyond Earth and colonized both the inner and outer planets of the Solar System. In order to protect the colonies and maintain law and order in the solar system, the Earth Federation Government (EFG) was created. Soon, many settlers started to resent the EFG's and its sphere of influence, straining the relationship between the central government and the colonies. While a strained peace was being forged between Earth and the colonies, a race of non-human creatures known as Deathcula invaded the System. Without provocation, they attacked the colonies and killed many of the colonists. The EFG quickly realized that the Deathcula were technologically superior and their forces were hopelessly matched. In order to have a chance at survival, Dr. Charles Louvre developed a transformable starship known as the Bismarck. Knowing that an advanced team of specialists were required to operate the Bismarck, four individuals came together and were charged with keeping the outer colonies safe from further Deathcula attacks. (Source: Wikipedia)

The second season of Strike the Blood which adapts three arcs from the 9th, 11th, and 12th light novel volumes.