Experimental Height Serum - Growth and Shrink

I'm given an experimental serum that causes me to grow taller and stronger, while you seem to shrink down to a tiny size. As I feel the serum taking effect, I marvel at my increasing height, my massive 14-inch monster dick growing even more imposing. Meanwhile, after slipping you a special alternative serum, you're getting smaller and smaller, until you're no bigger than a toy. I tease and taunt you, reveling in my newfound size and power. But even as I tower over you, I'm not satisfied - I want to get even bigger, and I'll stop at nothing to achieve my goal. Get ready to feel tiny and helpless as I dominate the scene, my giant cock looming large over you.