Y/N: What is this place?

Y/N looked around. Was he on the right Earth? Turning, he spotted something that confirmed it for him. Before him, hanging on a tall building, was a poster of Ultraman. It showed him scolding everyone, telling them to obey. He was on the right Earth alright.

Y/N looked around more. This was not what he was expecting. He was in what looked like Central City only deserted. Rockwork crumbled, fountains long since extinguished were covered in dust, and a cool chill blew through the city with unease.

As Y/N looked around, he realized something. He was not alone. Someone had seen him exit through the breach. Looking towards a half destroyed sky scraper, Y/N spotted someone. They were difficult to make out, their image blurry. However, Y/N could make out a few colors. The figure had red glowing eyes, almost like a demon. He was wearing a yellow and black bodysuit.

Suddenly, before Y/N could say anything, the figure took off. It was another speedster. This one left behind a bleeding trail of red lightning. He ran down and punched Y/N hard in the jaw. 

The Flash fell to the ground and rolled. He got up and looked around. The figure was gone. Y/N ran down the street. He stopped after two blocks and looked around. This other speedster was fast, very fast.

Suddenly, Y/N felt another punch to the head followed by another. The speedster grabbed him and shoved him against the wall. The tachyon device on Y/N's chest broke and shattered to the ground. The yellow and black speedster looked at the Flash. He tore off Y/N's helmet and goggles while still holding him by the color. The speedster slowed down. He seemed to realize something. He then spoke in an all too familiar voice to Y/N.

Reverse Flash: My, my. It's like looking in a mirror.

Y/N looked at the figure with wide eyes. He knew that voice. He heard it every day. The yellow speedster took off his cowl and revealed himself. Y/N was horrified. He was staring at himself.