"Record of Ragnarok" is an anime series based on the manga by Shinya Umemura and Takumi Fukui, with illustrations by Ajichika. The narrative centers on a grand tournament orchestrated by the gods to decide the fate of humanity. Every 1,000 years, the gods convene to determine whether mankind should continue to exist or face extinction. In a surprising turn, the valkyrie Brunhilde proposes a final chance for humanity: a one-on-one battle between 13 gods and 13 of history's greatest human warriors. If humanity secures seven victories, they will be spared; if not, they will be eradicated.

The series is structured around these individual battles, each showcasing the strengths, strategies, and backstories of the combatants. The gods, representing various mythologies, include figures like Zeus, Thor, and Poseidon, while the human champions are drawn from history and legend, such as Lü Bu, Adam, and Sasaki Kojirō. Each fight is a high-stakes clash of divine power versus human ingenuity, with the valkyries aiding the humans by transforming into divine weapons known as "Volunds."

The battles are not merely physical confrontations but also philosophical and ideological struggles. The gods often view humanity as flawed and unworthy, while the human fighters embody resilience, creativity, and the will to survive. The series delves into the motivations and histories of both sides, providing context for their actions and decisions. For example, Adam fights to protect his children, while Sasaki Kojirō seeks redemption for his past failures.

The overarching narrative is driven by the tension of the tournament and the growing stakes as each battle unfolds. The gods' arrogance and humanity's determination create a dynamic interplay, with unexpected twists and outcomes challenging both sides' assumptions. The series balances action with moments of introspection, exploring themes of mortality, legacy, and the value of human existence.

"Record of Ragnarok" is characterized by its episodic structure, with each episode or arc focusing on a specific battle. The pacing allows for detailed exploration of the fighters' abilities and personalities, while the overarching tournament framework maintains a sense of continuity and progression. The series appeals to fans of high-concept battles, mythological lore, and character-driven storytelling.