Yuiitsu Muni no Seirei Kajishi ga Saikyou no Bugu wo Tsukuru Made: Dwarf no Kaji to Elf no Mahou wo Kiwameta Saikyou Half-Elf wa, Mujikaku na Mama Musou suru

Elves master magic. Dwarves master blacksmithing. Born from both races, Lillie had been living a quiet life with her grandfather, away from all the conflicts of the world. But on her fifteenth birthday, her peaceful life changes when her grandfather reveals to her the deep-seated hatred dividing elves and dwarves. He drops another truth: long ago, the two races joined forces to forge "The Hero's Gear" during the war. If Lillie can forge an artifact that surpasses that legendary gear, she may be able to reunite two proud races. Armed with elven magic and dwarven craft, an unassuming spirit blacksmith embarks on an epic journey that will change the course of the world! (Source: Manga UP!)