Forcibly Demolish the Demon Suppression Tower and Let Me Merge with Shura to Save the World?

Traveled to the world of armored warriors and became Duan Muyan. But, why am I, General Duanmu, guarding the Demon Suppression Tower here? Is the world line in chaos? The Duanmuyan of this world is the descendant of the guardian of the Demon Suppressing Tower. In this era of prosperous science, no one knows that thousands of years ago, someone sealed the demon under the Demon Suppression Tower. And generations of tower keepers guarded the Demon Suppression Tower, endured loneliness, and sacrificed their blood in exchange for peace in the world. Now, the Demon Suppression Tower is about to be demolished. Duan Muyan, the tower guard, came forward to stop it, but was attacked and abused in various ways. Duan Muyan: OK, OK! Repay kindness with hatred, right? I quit! Who would have thought that at the moment he turned to leave, General Duanmu would awaken the summoning power of Shura Armor! The demon breaks out of the seal, and all life in the world is devastated. Countless people knelt down in front of General Duanmu, begging him to take action against the demon. General Duanmu: What are you talking about? I am Shura Armor!