For a Collage Night ransom note, I envision a playful, slightly chaotic style reflecting the creative energy of the event. The tone should be whimsical and mischievous, not threatening.

Theme: A ransom demand for creative materials, not money. The "ransom" could be specific art supplies, unusual found objects, or even a collection of photographs.

Specific Phrases: Consider phrases like: "Surrender your finest glitter!", "Hand over your most vibrant scraps!", "We demand your most eccentric buttons!", "Your collection of mismatched socks is our prize!", "Release the power of your imagination (and your glue sticks!)". The language should be exaggerated and fun.

Words to Incorporate: Words like "collage," "masterpiece," "creation," "artistic," "whimsical," "eccentric," "vibrant," "texture," "pattern," and "imagination" would fit the theme.

Style/Format: The note could be designed to look like a ransom note, but with a playful twist. Think torn edges, perhaps some strategically placed paint splatters or glue residue (simulated, of course). The font could be a quirky, handwritten-style font, or even a combination of fonts to reflect the collage theme. The layout could be asymmetrical and visually busy, mirroring the nature of a collage itself. Consider incorporating actual collage elements into the digital design of the note, such as small images or textures. The overall effect should be visually stimulating and fun, reflecting the spirit of a Collage Night. The "demand" itself could be presented as a list, a poem, or even a visual puzzle.