Twin Engine announced in March 2018 that the manga would receive an anime series adaptation, with the first season being produced by Wit Studio.

[2] The series focuses on Thorfinn, the young Iceland villager who aims to participate in wars like his retired father, Thors.

[7][8] Due to the airing of the World Para Athletics Championship sports tournament on NHK, Episode 18 was delayed and resumed on November 17, of the same year.

[15][16] While Askeladd receives his reward for saving Prince Canute, he daringly questions King Sweyn's order to subjugate his own homeland of Wales.

Askeladd justifies his statement by saying that the poor mountainous country of Wales is not worth the cost to conquer, and offers to broker a peace instead.