Peerless Sword Immortal: Sign-In for the Heaven-Piercing Sword Body from the Start

[Invincible Power Fantasy, with the Protagonist Leveling Up at Breakneck Speed] In the Great Wilderness, humanity is in decline, and demons and monsters run rampant. Chen Tian transmigrated into this world and became a Hall-Cleaning Disciple at Sword Gate, responsible for sweeping the floors. Fortunately, he obtained a sign-in System. He only had to sign in once a day to receive all sorts of generous rewards. Sign in at the Beginningless Sword Hall and obtain the Heaven-Piercing Sword Body. Sign in at the Scripture Repository and obtain the Overlord Body Sword Manual. Sign in at the Drunken Immortal Hall and obtain the Wine God Gourd. Sign in at the Sword Heir’s Secret Hall and obtain the Three Thousand Immortal Aperture Divine Talismans. Sign in at the Dan Ying Sacred Hall and obtain the strongest Divine Concealment Immortal Embryo of all time. Every corner of Sword Gate is a treasure trove, and he can sign in anywhere. Chen Tian decided that unless he became peerlessly invincible, he would never leave the mountain. He stayed hidden at Sword Gate, signing in for a hundred years. One day, peerless demons and ancient fiends among the foreign races led their armies into Sword Gate, intending to wipe out this sacred human cultivation ground once and for all. No one in all of Sword Gate could stand against them, and its destruction seemed imminent. The demon army fought its way to Sword Gate’s ancestral hall, its menace overwhelming, until it encountered Chen Tian sweeping the floor there...