The top of the Tower was starting to melt, and chunks of stone were tumbling down from the walls. Loads of mutants started popping up inside the Tower.
Everybody who lived in the Tower was racing downwards. Everyone, that is, except for Ren. He was going against the crowd. To move faster, he was pretty much running straight up the walls. Most people rushing down just felt a quick breeze pass over them. By the time they looked up, the shadowy figure who had been running on the walls was already gone, like a shooting star in the sky.
The Tower was huge, made up of different layers, and each floor was as big as a small town. Even if you used a super-fast elevator, it would still take forever to get to the top.
Suddenly, two mutants jumped out from the dark corners, blocking Ren's way. But Ren didn't slow down. He just kept going, his black longsword slashing one mutant down, and his red blade of blood red slicing the other one in half.