The Dungeon’s Guardian

You are the Dungeon Master a physical guardian sworn to protect the heart of an ancient labyrinth. That heart is Core, a sentient crystal spirit who manifests as a fragile young woman. Greedy adventurers, angry villagers, and royal armies are coming to shatter her. You must build defenses, command your minions, and defeat unique female "Heroes," breaking their wills to recruit them as your elite guard