Valhalla Saga

The strength of a Valhalla warrior comes from the Saga, a magical power born from the feats and achievements of their past life. Although Taeho was the world's greatest pro gamer and not a warrior, his character, the valiant Karstedt, was a legend in the world of Dark Age. Taeho must now begin a new saga to end Ragnarok and prevent the world from being destroyed.

(Source: WEBTOON)