Barry POV. 

"Sebastian back! We should be celebrating!" Cisco yells. 

"Cisco.... I have to talk to you," I eye Iris, "I have to talk to you in private." I whisper. I look at Iris again, and she looks at me oddly. 
"Barry?" She looks at Cisco then back at me.

"We'll be right back..."

"What's up?"
"You know how Sebastian has water powers? And how he realized he had then when he encountered... Nightshade?"
"Nightshade? Who's- ohhhhhh, ok. Yeah? What about it?"
"What if Nighshade did something?"

"I really doubt it, it must've just been like a trigger, a fear trigger."
"But, what if? What if something did happen?"
"Keep and eye out?"

"Yep." 

"Sebastian, get over here." I shout, Cisco threw a party, and he invited literally everyone that we know. 
"What's up, Barry?"
"You and Caitlin, you both all right?"
"Yeah, she's good, why?"

"She went into depression, I just wanted to make sure."
"I won't do that again, I swear." 

"Alright... I'm trusting you. Now do you have a plan?"

"Do I have a plan? I have a plan A, B, C, D, E, F, G and H."

"Wow, alright, we'll share plans tomorrow?"

"You got it Speedy."

"That's Thea."

"What?"

"Speedy... That's Thea, Oliver's sister."
"Who's Oliver?"

"Oh god..." 

"Let's get this party started!!!" Cisco yelled pumping his fist into the air. Everyone shouts, or claps. Cisco turn on the music. 

"Yeah, and it's so funny!" Iris turns, "Oh, hi Barry."

"Hey." I walk towards Cisco. 
"Did Gypsy not come?" 
"I invited her, but, she has work."
"Sorry man." 
"Nah, let's just have fun with our friends!" He jumps around. He might me a bit drunk but... Whatever.  

The party continues and I've been everywhere. I stand near the drink table then I see a shadowy figure in the corner of my eye. I look around, and no one else saw it. The person walks closer to the girls, and passes them, so I start making my way through the crowd. They stop in the center. 

"Everybody, FREEZE." They command. And everyone stops and turns. "I'm here to simply tell you, the time is nearing, beware, Killer Frost." Suddenly Caitlin turns. 
"Caitlin!" I run to the person, but then hit me with god know what. 
"I said, beware."
Sebastian's powers start going crazy, the drinks- only the liquid part from every single cup starts to float up. And so does Sebastian. I groan. 

"Take that!" Wally yells. He throws a lighting bolt, but the person catches it and throws it back. "Arrrgh.." Wally falls to the ground, but Joe catches him. 

"Ice." Killer Frost starts to throw ice everywhere. Making people dodge icicles.

 I get up and run a bunch of people to a safe place. Leaving, the person, me, Caitlin, Sebastian, and Cisco. Caitlin continues throwing ice, and Sebastian start to drop water everywhere. 

"What the hell is going on?" Cisco yells. 

Here goes nothing. I enter Flashtime.