Create a vibrant digital illustration for a trendy t-shirt design aimed at teens, featuring a mashup of "Rick and Morty" and "Harry Potter." The design showcases Rick and Morty in whimsical wizard robes, with Rick dynamically casting a spell with one hand raised, while Morty stands beside him, looking bewildered with his hands raised in surprise. Surround them with floating magical objects such as spell books, wands, and potion bottles, enhanced by a swirl of sparkles and light trails to emphasize the magical theme. The typography should read "Wizards of the Multiverse" in a bold, whimsical font, prominently centered across the chest. Utilize a vibrant color palette of greens for the robes, purples for the magical effects, and golds for accents, ensuring a cohesive look that reflects both worlds. The medium is digital illustration, employing layered graphics with magical effects. In post-production, add sparkles and a soft glow around the magical objects to create an enchanting atmosphere. The background should be transparent for easy application on the t-shirt.