A.N: This is my first Fanfic so read and review and make any suggestions, I can use to fix any errors. I apologize for any wording you might find weird bad habit of mine when I write.
In the prison cell where both Fairy Tail Wizards Natsu Dragneel and Lisanna Strauss are currently locked and chained. The two mages are currently trying to find a way to get free and save Erza and Mirajane. As the mages were thinking someone walked up to the cell door and open it. Both mages look up and see none other than the master of Tartarus himself the Underworld King Mard Geer and with him are several Tartarus Soldiers.
"Take the pink hair mage to the throne room now" Mard Geer Demanded to the soldiers.
"As you command, Lord Mard Geer" the soldiers responded in unison. Then they move towards Natsu and lift him up.
"HEY WHAT'S THE BIG IDEA PUT ME DOWN!" Natsu yelled as he tried to squirm out of the soldiers hold, but it did not work as he was out of strength and magic, though Natsu still continued to struggle.
"PUT ME DOWN RIGHT NOW AND TELL ME WHERE ERZA AND MIRA ARE RIGHT NOW!" Natsu yelled at the guards. Mard Geer simply ignored the shouting dragon slayer and continued on to the throne room.
Once Mard Geer and Natsu had arrived at the throne room, Natsu was bound by Mard Geer's curse and pinned to the large black cross. Not understanding what was going to happen Natsu began to shout again.
"HEY! WHAT THE HELL IS THIS!" Natsu shouted. Mard Geer simply smirked as Natsu.
"Do not worry, Natsu Dragneel you are about to be part of the greater good" Mard Geer stated.
"What are you?... as Natsu was about to ask the question he felt powerful shockwave going through his body.
"AHHHHHHHHHHHHHH" Natsu screamed. This is unlike any kind of pain Natsu felt like he was repeatedly struck by lighting.
The shocks keep going getting more powerful after each. As they were getting stronger Natsu's screams to start echoing through Tartaros' HQ. The echoes reaching everyone in the headquarters.
"Now Awaken our Master E.N.D" Mard Geer chanted as he placed E.N.D's Tome to Natsu chest, and it begins to merge with Natsu, and Natsu continued to scream.
"So Mard Geer is finally going to release him," Kyouka said as she heard the screams from her quarters.
Library
"Our Master is finally going return," Seliah said looking up from her book.
Throne Room
As Natsu screams continued black markings begin to form around his body, he also begins to grow two small horns on his head as his hair also begins to spike up more.
"What's happening to me?" Were Natsu's final words as he faded into unconsciousness. Moments later his eyes opened, his eyes completely black and red.(A.N Not good at describing things sorry).
"Mard Geer, it's been a while," Natsu said while standing up making eye contact with the Underworld King.
"It sure has, Master E.N.D" Mard Geer said as kneeled before him.
"So I take it that everything is going according to plan" E.N.D stated.
"Yes, my Master" Mard Geer answered.
""Good" E.N.D responded. E.N.D then began to walk up to the throne and sat down.
"Now this entire World will End"