The design features an elegant and classic design with a focus on typography. The word "Expelliarmus" is prominently displayed in a bold, serif font that exudes a sense of sophistication and authority. The letters are capitalized, enhancing their impact and making the text stand out. The overall layout is simple yet striking, with the text centered and the background providing a clean and uncluttered canvas that allows the design to shine. The design is likely intended to convey a sense of magic, mystery, and power, reflecting the spell's ability to disarm and protect.