Villains are amazing to draw! They offer so much complexity and depth. To make a villain visually striking, remember it's not just about making them look 'evil'. Play around with unconventional designs, exaggerated features, and unique silhouettes. Incorporating darker, bolder colours in their clothing and making them appear physically imposing are good ideas. It's also crucial to convey their personality through their expressions, postures, and details - a condescending smirk, a threatening stance, or intricate tattoos signifying a dark past. Just make sure your design elements align with their character traits, backstory, and their role within the plot. Happy drawing!