Kamen Rider Blade - Season 1

Ten thousand years ago, a massive battle royale known as the Battle Fight was fought by fifty-two Undead, each representing a species fighting for dominance over all others. The winner was the Human Undead, known as Category Two of Hearts, giving dominion of the Earth to humanity. In the present day, archaeologists discover the sealed Undead, and accidentally set them free. Thus, a new Battle Fight begins.