Create an image of a heroic figure battling a dragon, where the dragon's scales create an optical illusion of swirling colors and patterns reminiscent of a painted masterpiece.

Depict an adventurous scene of a valiant hero, a South Asian male with a suit of shining armor, engaged in an intense battle against a large, ferocious dragon. The dragon's scales should be of special interest, as they create an optical illusion of swirling colors and patterns. This mesmerizing effect on the dragon's scales should be similar to the intriguing illusions found in Victorian-era optical art. Concentric circles, hatched lines, and spiraling designs in stunning, vibrant hues should emanate from the dragon's body, creating a visual spectacle akin to a painted masterpiece.