Zongwu: Draw a Billion Sword, My Sword Will Open the Gate of Heaven

[Beiliang is in danger, and powerful enemies are besieging the city. Xu Tian spent twenty years in seclusion at Tingchao Pavilion, drawing his sword hundreds of millions of times every day. [System progress: 99.99%] When the maid knocked at the door and a powerful enemy came to the door, he opened his eyes in the darkness and held the sword that had been shaking for twenty years. "If you don't become number one in the world, why don't you get out of this level?" "No." "Today, I set the rules for the world." When the sword comes out, the gate of heaven opens, and I am invincible.