Lord of the Abandoned Tower: Demolish It and Take Off Directly

Western fantasy lord management flow + farming + refreshing data + multiple female protagonists + legion melee + slow heat. Lu Li traveled to the abandoned tower territory, the poorest place in the kingdom, and found that he had a demolition blueprint system in his mind - demolish the stables and reveal the [Inn Blueprint ★★]; demolish the old granary and reveal the [Wind Mill Blueprint★★]; demolish the ruined tower that had collapsed for three hundred years and reveal the [Lord's Stone Castle Blueprint★★★]... He became an engineering mage. What others see as scrap metal, broken walls and tiles are all gold mines in his hands. Half-elf Ivy stood on the wall, watching the territory rise from the ruins, watching him tear down the decay and build a new stone castle. But what he didn't know was that the things under the abandoned tower were older than the three-hundred-year-old tower; among the relics that the old lord locked in the cellar before disappearing, there was an unfinished letter: "If I can't come back, don't let them find what's under the tower..." Destroy a tower, erect a castle, and dig out centuries-old secrets of the kingdom.