The 18th Hung King organized a contest between two powerful gods for his daughter's hand in marriage: Sơn Tinh, a mountain God, and Thủy Tinh, a water God. With control over mountains, seas, and storms, the two engaged in a fierce struggle, causing devastation across the lands. Sơn Tinh emerged victorious, defending the people's homes and crops by raising the mountains until Thủy Tinh retreated.