Despite Thawne telling her to wait, Reign decided she'd waited long enough. However, she wasn't planning on going after Supergirl. Right now, she had a more important target in mind.

"You sure you want to do this?" Thawne asked.

"Supergirl herself is not my biggest threat. My biggest threat is the one to whom I'm still connected to." Reign said.

"The Arias woman? How is she a threat to you? You said it yourself, the stronger you get, the weaker she becomes. Soon she'll be dead." Thawne said.

"Unless Supergirl discovers that the connection goes both ways. If she is able to empower Samantha Arias, she will grow stronger and I will get weaker. Weak enough for her to end me." Reign said.

"So you're going to kill her before she gets the chance to kill you." Thawne said.

"Exactly." Reign said.

"Then by all means, go." Thawne said.

"You aren't coming with me?" Reign asked.

"I don't need to for this. Besides, my attention is more focused on helping us recruit allies to not only take down our respective enemies, but every other hero on this planet who stop us." Thawne said.

"Us? You are aware that once our mutual enemies are dead, our agreement ends, as does this world." Reign said and Thawne's head shot in her direction.

"What?" Thawne asked.

"You heard me. You're nothing more than a means to an end. Once my opposition is defeated, I will do as I was always meant to. I will trigger the events that will cause this planet's destruction to ensure the rebirth of Krypton." Reign said.

"If you destroy this planet, you will change the timeline and wipeout the events that are necessary for my birth." Thawne said.

"Do you really think I care about that Thawne. You're a tool. Nothing more, nothing less. And tools get discarded when they're no longer useful." Reign said with a cold grin as she flew out of the fortress, leaving Thawne to consider his options on what he should do now.

Reign flew into the window of Sam's hospital room and smiled at how weak and pathetic her former host looked.

"It's almost funny how despite how weak you look, you could be the thing that ends me. But you will never get the chance." Reign said as she powered up her heat vision, only for it to be intercepted by a blue beams.

"What the?" Reign asked as she looked up to see Supergirl standing at the door.

"You know visiting hours are over right?" Supergirl asked.

"You." Reign snarled.

"Why are you here?" Supergirl asked.

"I must ensure that no one can beat me by severing the link we share." Reign said.

"By killing Sam?" Supergirl asked.

"Of course." Reign said like it should be obvious.

"Not tonight." Supergirl said as she flew into Reign and slammed both of them out the window, causing people to scatter when they hit the street.

"You really think you can stop me?" Reign asked skeptically.

"Let's find out." Supergirl said.

"As you wish. I was only planning on killing Samantha Arias. Killing you however, that's just an added bonus." Reign said.

"Bring it on." Supergirl said as Reign charged towards her, but this time Supergirl ducked and used her own momentum against Reign.

"You're like a bull, all strength, no control." Supergirl said with a grin and Reign sneered as the two began fighting.

Both Reign and Supergirl had landed some solid shots, but Reign still had Supergirl beat on muscle.

"Today the last daughter of Krypton dies." Reign shouted at Supergirl as she stood over the girl of steel.

However, before Reign could land the final blow, she stopped suddenly as she felt a vibrating hand hit her gut. Not hard enough to go through, but enough to knock her back.

Supergirl honestly thought Reign had hit her too hard, since she could have sworn she was hallucinating the sight in front of her.

"Traitor." Reign said.

"You betrayed me first." Reverse Flash said as Reign got to her feet.

"This isn't over." Reign said as she flew away.

Reverse Flash turned to Supergirl, who thought for sure he was going to end her.

However, to her surprise, he offered her his hand, which she rejected.

"What are you doing here?" Supergirl asked.

"What does it look like I'm doing here. Saving your life." Reverse Flash said.

"Why would you do that? What do you want?" Supergirl asked.

"The same thing as you do." Reverse Flash said.

"I highly doubt that. What do you want?" Supergirl asked again.

"It's simple. I want to save the world." Reverse Flash said.