Read the ultimate kingdom-building manhua Release That Witch in English. Roland, a modern-day mechanical engineer, is reincarnated as a weak prince in a medieval fantasy world. Unlike other isekai heroes who rely on magic alone, Roland uses his scientific knowledge to spark an industrial revolution. By rescuing and teaming up with "Witches"—who are persecuted as heretics but possess incredible supernatural abilities—he turns their powers into biological steam engines, modern firearms, and advanced chemistry. Watch as he builds a dream city, defeats the church, and defends his borders with the power of technology and magic combined.