The World's Strongest Rearguard: Labyrinth Country's Novice Seeker (Manga) Vol 04

Down in the uncharted depths of the Field of Dawn, the gang faces off against the "Eagle-Headed Warrior" Named Monster protecting his domain. Arihito manages to save his friends from the monster's crushing power, but takes a fatal blow since his defensive barrier doesn't work on himself... Yen Press
(W) Towa, Huuka Kazabana (A) Rikizo