The New Gate Vol. 3 (manga)

After defeating the final boss in THE NEW GATE, the online game's most powerful player, Shin, is transported to another world just like the in-game world. There, Shin travels to the Spirit Plains as part of a quest, where he encounters an overwhelmingly powerful monster called a Skullface Lord. A fierce exchange of attacks ensues, but the battle drags on until a beautiful high elf suddenly swoops in, shredding everything in her path.