Building a magic world is like painting with invisible ink—it only appears when you shine the right light on it. My approach starts with rules; even chaos needs boundaries to feel impactful. I sketch out how magic works—does it drain the user? Is it tied to emotions, bloodlines, or ancient artifacts? For 'The Name of the Wind', Rothfuss made sympathy physics-based, which grounded the fantastical. Then, I think about cost. Magic without consequence feels cheap. In 'Fullmetal Alchemist', equivalent exchange gave weight to every spell.
Next, culture shapes magic’s role. Is it outlawed, like in 'Dragon Age', or worshipped, like bending in 'Avatar'? I map how it affects daily life—do farmers use spells for crops? Are there magic-powered streetlights? Small details make the world breathe. Lastly, I leave gaps. Over-explaining kills wonder. Tolkien’s Middle-earth feels vast because we only see fragments—like the Blue Wizards’ untold stories. Mystery invites readers to wander beyond the page.