The Legion now say their goodbye now that they need to go back to their timeline now that the Blight never happened and Brainy gave Winn dirt from the future as a farewell present.

When they left, they learned reign attacked Lena and James at her place and they went to find clues to where she went to.

"Why would Reign attack Lena, though?" Kara wonders.

"Well, Lena did improson Reign and then, you know, experimented on her for a bit." Winn reminds her.

"Revenge isn't really Reign's MO." Peter says when Lena and James join them.

"Reign wants looking for me. She's looking for Ruby." Lena tells them.

"Sam's daughter?" Peter asks.

"Ruby's safe, I promise." Lena says.

"Are you okay?" Kara asks Lena.

"I'm okay." Lena assures her friend.

"So Reign is after Ruby and she started with Lena." J'onn sees.

"Where else would she look?" Alex asks.

"Sam's mother, Patricia, she lives on a farm outside the city." Lena replies.

"Me and Skirt will get Patricia to safety and wait for her to attack." Peter tells them.

"Did you learn anything with Reign that will help us fight her?" J'onn asks Lena.

"Electricity. It was how I was able to wake Reign up and force her back down." Lena answers.

"Well, it's a good thing my suit runs off of electricity." Peter says.

Alex asks Lena to tell her where she is and it's Lex's mansion that has a cloaking mechanism making it the perfect hiding spot.

-

Peter and Kara visit Sam's mother and it seems she already knew Sam was Reign and never told her about where she was from so she could be normal. What was most disturbing was when they were shown her Reign symbol drawn on her room wall.

She also refused to leave so she can try to help Sam if she can.

As night fell, they wait for Reign to appear and everything is peaceful when they suddenly see plants start to die and Peter's senses go off.

"Pestilence?" Peter asks, confused how that's possible.

"She killed Pestilence." Kara remembers as Reign starts to approach the house.

The heroes wait for her to enter.

"Patricia. Are you home?" Reign asks as she uses her powers and sees someone hiding in the bedroom closet.

She calls out for Ruby, hoping she can find her.

"Sweetheart, it's mommy. Did you miss me?" Reign asks as she opens the closet and sees Peter aiming a missile at her.

"I never miss." Peter informs her before blasting the missile that explodes, sends Reign through the wall and wraps her up in a dozen taser webs to her person.

It holds her down, but not for long as Reign gets up and uses Purity's sonic scream and Patricia runs out and pleads with Sam to fight against the monster.

But Reign used Pestilence to kill her and Kara gets back up to fight and throws her into the burning home.

"Reign now has all of the Worldkillers powers, we need to get out of here." Peter says and they take Patricia to try to save her.

-

By the time that they made it to the DEO, Patricia didn't make it.

"Reign is now three times stronger, how can we fight that?" Kara questions, seeing no way they can do it,

"Usually, I'd say your heart to see the goodness in people, but I have a feeling with the triple power, there is a triple chance Sam is now trapped inside of Reign and will be harder to reach." Peter states, not wanting to lie to her. "Because I saw no humanity left in Reign we can reason with."

"White Martians are just as soulless, wouldn't you think?" Kara asks and Peter sees what she's saying.

They went to the apartment where J'onn's father Myr'nn is living and he says he didn't persuade or get through to the White Martians, but all he used was what they believed in to spare his life. And if they killed him, they would have lost it all.

And with Reign, she only cares about justice. That's something they can use.

They return to the DEO and Peter sees Lena being brought in with a suitcase and escorted by several guards.

"Guys, that's not necessary." Peter tells them and they leave the two. "What do we owe this visit to?"

"I have something for you and Supergirl. And don't be alarmed, it's inside a lead lined case." Lena says.

"Kryptonite?" Peter asks, now a bit worried.

"To help you fight Reign." Lena explains.

"I...thought you used all of your brother's kryptonite." Peter reminds her while a bit more alarmed.

"It's not Lex's, it's mine." Lena explains.

Peter looks at her with a brow raised under the mask and getting more alarmed. "I'm gonna need a bit more help understanding."

"I figured out how to make it, and I did. And supercharged it just for Reign." Lena explains to him.

"Oh. Yeah, Skirt's not gonna like that and you know how to make it." Peter warns her.

"Which is why I'm kinda glad it was you I ran into, Kara gets hurt when it comes to kryptonite. Sees it as a personal attack, and I..partially see why." Lena replies.

"Well, she doesn't like to feel weak, if she's weak, there's a chance either she will be hurt or someone she cares for. But I can convince her that we can use this to subdue Reign. Except, this substance is dangerous and we can't risk it falling into someone else's hands." Peter tells her and takes the case from her. "So keep it safe, keep it hidden. If there's one person that I know we can trust with kryptonite, it's you. Hmm, I trust a Luther with kryptonite. Never thought I'd actually say that."

Lena smiles at his attempt of humor and his response to the kryptonite. "Thanks for trusting me, Peter."

"Thanks for giving us a fighting chance against Reign. I might walk away from this alive." Peter says as he goes to find out where Gwen kept those instructions to make kryptonian-slayers weapons.

-

They later get an alert that Reign has found Lex's mansion and Peter filled Kara in on the kryptonite when Mon-El appeared to help them as the others went to the future, and left him.

The three heroes make it to the place and through Lex's gigantic mansion that filled up an entire field. Where they found Alex, Ruby and Reign in the secret vault

"Reign!" Supergirl yells and flies off to stop her and Reign slams Kara into some of the Luther expensive stuff.

Mon-El flies in and Reign starts to fight him as Peter goes in from behind and tries to blast her with kryptonite, but can't get a clear shot on her when Alex shoots her with a taser net.

Reign fights off the net and slams Kara and Mon-El through the room. Peter goes to web her back, but Reign spins and sends him flying now.

Peter slides across the floor and hits his head against the wall and feels the blood coming from his head before he starts to pull himself back up on his elbow as Reign approaching Ruby.

"Okay...you wanna play rough?" Peter asks as he raises a kryptonite missile to Reign's back and starts to warm up to fire. "Then say hello to my little friend." He says before the missile flies off and slams Reign into the wall and her mask comes off.

Ruby then gets a look at who is under the mask and is confused as Alex gets her out of the way and Reign regains her strength.

"No, you can't!" Kara tell Reign as she still approaches Ruby.

"You would stop me?" Reign asks.

"I don't have to. You have a code, a purpose. You fight against evil and dispense justice." Kara reminds her. "You're here to make a better world, one without sin in it. But this girl has not sinned. You can't kill her. You won't." She states and she gave Peter enough time to warm up his kryptonite bullet mini-machine gun before rapidly firing to weaken Reign with each bullet, not to harm her and she falls unconscious.

-

They bring Reign to L-Corp and back into Lena's container that was able to hold her last time.

"Thank you for the kryptonite, Lena. It really helped us in the end." Kara thanks her friend.

"You're very welcome." Lena says, happy her friend approved on her work. "Now if you excuse me, I'll start working on a cure for our friend." She tells them before walking off.