CHILDREN OF THE RUNE

After fleeing from his home during a family feud, Boris Jineman is left with only his brother and Winterer, the family's treasured sword. But when his beloved brother sacrifices his life for him, 12-year-old Boris becomes the sole guardian of Winterer in a world where this sword is coveted by all. As Boris struggles to fend off those who are after his family blade, his heart only grows colder and stiffer. Will this young boy be able to survive this winter to reach the spring that awaits him? (Source: Tapas) — Description from AniList community (anilist.co).