The Favonius Codex is an elegant, book-like weapon with a hardcover binding adorned with intricate gold filigree and the emblem of the Knights of Favonius. The cover is made of a dark blue leather-like material with a smooth, slightly weathered texture, suggesting frequent use. The pages inside are edged with gold and appear slightly aged, with faint magical runes glowing softly in a teal hue when activated. The book is secured with a decorative metal clasp that features a winged design, symbolizing freedom and the Anemo Archon's influence.