Design a 6.5-inch action figure called "Jellyjack the Abyssal Warrior." It features a muscular body with an oversized head, expressive eyes, and a playful grin. The skin has iridescent colors of deep blues, vibrant purples, and glowing pinks, reflecting light like a jellyfish. Flowing tentacle-like appendages hang from the arms and waist, while crude, hyper-detailed armor with a bio-luminescent jellyfish emblem adds to the retro aesthetic.