Gaist Crusher is a tV series anime that premiered in fall 2013, produced by Studio Pierrot.

About the production: the story comes from a video game, there are 51 episodes of about 20 minutes and its current status is "finished".

Its main genres are action, fantasy and supernatural, with themes such as Superhero and Henshin.

On AniList, Gaist Crusher has an average score of 59%, an average score, and appears on 904 users' lists.

In the story, Gaimetal, a metal ore with high amounts of pure energy, was discovered 50,000 meters (160,000 feet) underground in 2047, and mining began all around the world. However, Gaist, metallic lifeforms whose bodies are entirely encrusted with Gaimetal, emerged in 2055 and began attacking people. In 2064, Rekka, Hayato, Kurama, and Siren are among those who suit up in Gaist Gear and battle over 100 varieties of Gaist creatures. (Source: Anime News Network)

Official synopsis from AniList.