Castle for the Sand
Changing the look of a classic villain, this was the appearance of the masked Sandman suit. I loved that look when first reading it as a kid all those years ago. It was noted that using the suit's tech, Sandman fought Spider-Man to a draw, then gained an advantage, then disadvantage, without any true dominance. Sandman, still a brute, began using his brain a bit more from here on out.