No one asked but here you go. Hyh went berserk on shj coz hyh realized what was on shj's mind back in chap 66-67(the double dungeon that has the giant toad monster). Hyj having the taste of mc's amp skill, realized that shj intends to kill everyone in there and keep mc all to himself so he can have that amplified skill whenever he wants. That's why Hyh got mad and attacked Shj
No one asked but here you go. Hyh went berserk on shj coz hyh realized what was on shj's mind back in chap 66-67(the double dungeon that has the giant toad monster). Hyj having the taste of mc's amp skill, realized that shj intends to kill everyone in there and keep mc all to himself so he can have that amplified skill whenever he wants. That's why Hyh got mad and attacked Shj