A Single Step-Lucy X OC-(A Fairy Tail Fan-Fic)

//Lucifer POV//

"Here, Senpai-chan." A little girl said to Lucy as she gave her a cookie as Lucifer finishes bandaging Lucy's arm since she had gotten a few cuts from the battle she had with Felicity.

"Thank you." Lucy thanked the little girl and quickly ate the cookie.

"Lucifer...your trial begins now..." Felicity said as she entered the room.

"Trial?" Lucy asked.

"In order for Lucifer to get stronger, he must drink down the potion to find his inner strength that is yet to awaken." Felicity explained.

"Inner strength?"

"Many had gone insane because of this potion, other became murderers because of their inner demons...most died." Felicity warned them.

"Where is it?" Lucifer asked.

"Follow me-" Felicity said but Lucy spoke up.

"Hold on a second! Why is Lucifer doing this?! We came here to get stronger, not to be poisoned by-" Lucy shouted.

"He will be stronger!" Felicity shouted. "He must take this potion! It is the only way he can even the odds against Marcus!"

"But why?" Lucifer asked.

"Because Marcus took the same potion as well..." Felicity slams her fist on the wall beside her. "...He is stronger than ever...and he tried to keep it a secret...I tried to keep it a secret because our guardian angel told me to..."

"What's with all this guardian angel crap?!" Lucifer shouted. "Who is she?!"

"I...I can't tell you..." Felicity calms down and looks at Lucifer sadly. "Just do what must be done...and I will tell you who she is..."

"...Lucifer...I don't like this...if there are side effects-" Lucifer stops Lucy there.

"We don't have much choice...we came for her help...I trust her..." Lucifer turns to look at Felicity. "Lead the way."

//Lucy POV//

No...he has no reason to do this...so why-Lucy stops thinking as they walk to the end of the hall and sees a door. Felicity pulls out a pair of keys and unlocks it...it was a small room...but in the middle of the room was a table and a large wooden cup with steam coming out of it...

"Is that...the potion?" Lucy asked.

"Yes...the potion is made up of dark magic, the blood of the damn...and blood of a dragon." Felicity said.

"Dragon?! Where-" Lucifer and Lucy cried out.

"I don't know...I didn't make it but it is the potion." Felicity answered. "Lucifer Black...when you enter the room...when you drink the potion, all of it...The demons will take a hold of you. You will be alone to face them..."

"...just like always..." Lucifer muttered as he starts to walk towards the room but Lucy quickly grabs his arm. "Lucy?"

"...I know you won't change your mind...but..." Lucy grabs him by the cheeks and kisses him quickly before pulling away. "...But come back to me when it's over."

"...You know I will." Lucifer smiled and kisses her forehead. "No matter what, I will come back."

"...Okay..." Lucy said nervously as Lucifer goes in and closes the door behind him. She couldn't see him anymore as he entered the room and Felicity locks the door.

"It is best to lock it...for when he drinks the potion and the demons take over...his entire body will transform to the very creature that he calls his pain." Felicity said.