Traveling Through the Age of Steam, but as a Druid

"Hold your weapons and watch them." "This is an upward attack, this is a downward slash, this is dodge..." "Very good. You have learned all the necessary fighting skills. Take your Book of Life." "Have you seen the end? Go kill Him and save the world." "?" … After being reborn from the dungeon, Russell opened his eyes and saw a fantasy world where the sun never sets. Steam, magic, dungeons; knights, oaths, secrets and sealed objects, this is an unusual world; The tentacles of the old gods are all over the earth, the conspiracy and epic have come to an end, a new era, the wheel of the times is rolling in, Russell holds the Book of Life, the prophesied savior of the world. But before that, Russell urgently needs to solve a problem. Groove's Book of Life is to make me turn into a mouse to act cute, right?