Responses
Hi, it's "the guide of souls", the skeleton boss with horns (defeated very fast so i don't relally understand the b comparison of the author =P )
http://www.mangago.zone/read-manga/solo_leveling/mdx/hs_chapter-60/pg-1/
the last chapter 66 jin woo said that the boss was stronger than someone ..actually two names he mentioned and i don't remember who they are? *too lazy to go read again hahaha somebody tell me please( ̄∇ ̄")!