The front cover of this birthday greeting card should feature a lively and comical birthday scene, inspired by the iconic style of classic illustrators. Picture a vibrant, hand-drawn street party unfolding amidst a whimsical urban backdrop. The street is bustling with various Avengers-themed characters, each reimagined with a playful twist.

In the foreground, draw a large, round cake, its layers brightly iced in bold colors reminiscent of each Avenger's signature palette – rich red for Iron Man, deep green for Hulk, navy blue for Captain America, and a splash of gold for Thor. The cake is topped with tiny, expressive figures of these superheroes, each caught in a light-hearted, exaggerated pose. Have Iron Man with his repulsor beams lighting up in a comical zig-zag, Hulk lifting a cherry in a pretend roar, and Thor balancing a candle in place of his hammer.

Position a large, festive banner arching above the scene, boldly scripted with the word "Kaius" in playful, dynamic lettering that suggests movement and energy. This banner sways slightly, as if caught in a gentle breeze, with colorful confetti falling around it.

The background showcases a mix of stylized city buildings, their rooftops dotted with tiny, intricately detailed figures of friends and family, watching the festivities below. Sketch these buildings with ornate embellishments, taking cues from Beardsley and Gorey's attention to detail, using intricate linework and light crosshatching to provide depth.

Add clusters of balloons floating in the sky, each emblazoned with iconic symbols of the Avengers, like Captain America’s shield or Thor's hammer. The sky itself is a gradient of pastel hues – soft blues melting into pinks and purples as if capturing the moment just before sunset.

Scatter smaller elements around the scene: a table to the side laden with quirky superhero-themed party snacks, like Hulk-smash guacamole and Iron Man-themed cupcakes. A few playful pets dressed as Avengers (imagine a tiny dog with Loki’s horns) add a touch of whimsy, channeling the charm of Beatrix Potter’s anthropomorphic style.

The entire illustration bursts with energy, each element meticulously detailed to create a rich, engaging tableau that invites viewers to dive into this imaginative birthday celebration.

Generated with these themes: Avengers.

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