Baki Gaiden - Retsu Kaiou wa Isekai Tensei Shitemo Ikkou ni Kamawan - Vol. 2 Ch. 10 - The king of Brakirka

[MangaDex]

 

[kevs101]

OFC thats how the king looks like

 

[th3sh4k4]

the same 'GU' ritual mentioned in Kengan Ashura

 

[TheBlarfe2000]

this really gives off the same vibes as old school shonen manga from before the 90s, mainly because of it being focused on what would be cool, fun, and entertaining to read rather than having an overarching story.