MTL - In This Hogwarts Without a Savior - ~ sacrificial wave

The male lead is devoted, the female lead is passionate, childhood sweethearts, everyday family matters, the ordinary daily life of nurturing a wife.

He lived from BC to the Middle Ages, from the Renaissance to the Industrial Revolution, and from Cyberpunk to the Interstellar Age. He has been a king and a prophet, a knight and a nobleman, a versatile artist, a genius inventor…
This is a four-thousand-year human epic——
“To us four thousand years from now:
“Is the world at peace? Is famine extinct? Can people touch the stars? How long is the human lifespan? How far is the boundary of the earth? Human…do you remember us?”
——Excavated from Earth Age Tenth Century BC, Solomon Prayer Book.

- Description from novelbuddy

Suddenly pulled into a world filled with Specters, Fang Xiu woke up with a unique ability: Reset. Every time he died, time would rewind to the moment before he was killed.In this strange and dangerous world, Fang Xiu could have chosen to hide. Instead he announced to the world, “Yes, I’m a prophet. I can see the future!” As his predictions kept coming true, his title of the Prophet spread around the world.His words became the truth. They became the future.“I have seen the future,” he announced, attracting people from all around the world.His followers took it to the extreme, declaring, “Should the Prophet decree your demise one day, don’t waver, don’t question, just obey. For hesitance only leads to a far graver fate.”During a B-level Specter event, known as [the Spawning]A teammate warned, “The creature is hiding among these villagers. We need to be careful.”Fang Xiu pointed to the last row and commanded, “The one in white. Yes, you. Come out!”In an A-level Specter event, called [Lantern Heads]One teammate warned, “This area is crawling with thousands of Lantern Heads. If they shine their light on you, your head will fall off. The scariest part is the Lantern Heads float unpredictably. It’s impossible for anyone to get across safely. Wait, where’s Fang Xiu?”Another stuttered, “He, he…he’s on the other side!”The first teammate exclaimed in disbelief, “What?! How did he get across?”The other replied: “He…he just walked over.”

The fiancée has betrayed, but how could she know that the man she looked down upon was in fact a prodigy with healing and martial prowess!