Rei appeared not far from the city, his eyes where bloodshot.

"Blood....." He whispered as he started to walk over to the city. Rei suddenly jumped up and formed blood wings on his back while he flew towards the city. His consciousness was all over the place as all he could think of was blood.

*BBAAAANNNNNGGGGG

A sudden cloud of dust rose as Rei landed in the middle of the city. The surrounding vampires looked over at him and started to cower from the bloodline suppression. Some seeing how Rei looked decided to take a chance and launched them selves towards him.

Changing his blood wings to two long swords one of each hand, Rei easily cut through 1 of the attacking vampires. Using the blood in the vampire, Rei sent a wide slash using the blood easily cutting through the body of the vampires and the buildings. Gathering all of the blood in the area into a small condensed pill, Rei ate it before frowning.

"Low quality trash...." He growled as he shot towards where he could feel the most powerful blood line in the kingdom of Edinburgh. Through the streets Rei had to cope with countless attacks from the enemy vampires who were lusting over his blood. Rei growled in annoyance as he was getting sick of the endless horde of vampires.

Gathering blood into a spear, Rei threw it up causing it to leave a streak of light catching every one of the sin's attention. Clenching his hand, Rei caused the spear to explode into a rain of blood, each droplet became arrows as it covered the entire kingdom of Edinburgh. Screams rang out as the vampires had their body pierced and unable to regenerate. Using the arrows as a medium, Rei drained every one that the arrows touched of their blood. A river of blood soon appeared in the kingdom of Edinburgh gathering into one single point. Rei.

Merlin was curious as she saw what happened in the span of a few seconds. Using her magic, Merlin looked over to where the blood was being gathered and widened her eyes to see Rei drinking all of that blood.

"Captain!! Rei chan is over there! Where the blood is being gathered." Merlin shouted towards Meliodas.

"Why is he here?!!?! I though you put him in your barrier!!" Meliodas shouted out.

"He must have rewired it to take him here. I think that's the last thing he did before losing himself. Because right now, he wants blood. A lot of blood." Merlin said as she was both proud and worried. Proud because Rei was able to utilise her seals as well as the fact that he left Liones so that the people wont get killed. Worried because he is losing himself more and more.

"Fuck! Escanor! Come! The sun should be rising soon so you should help restrain Rei! Merlin take Escanor, I'll need to deal with two guests that have arrived." Meliodas said as he looked at the two new arrivals. Gelda and Ren.

"Got it." Merlin said as she teleported her and Escanor with his axe to where Rei was.

When they arrived at the location, they could see Rei drinking away at all of the blood while. His scarlet eyes moved towards Merlin and Escanor.

"More blood...." He whispered before launching himself towards Merlin. Quickly forming a barrier, Merlin stopped Rei's approach. Frowning slightly, Rei opened his mouth before he started to eat away at the barrier as it was made from energy. Merlin was shocked as she didn't expect her barrier to be on the list of things Rei can eat. Quickly, retreating with Escanor. They managed to avoid Rei's bite right after he finished eating the barrier. Merlin could see Rei crouching as his fangs were longer than usual.

"Rei chan....." Merlin said worried for Rei.

Rei suddenly smiled as he could feel the approach of the vampire king Izraf.

"I didn't expect to see someone with such a high purity of the vampire blood. But to think that it belonged to a child." Izraf said while he looked at Rei who was having his blood crave.

"I see that this is your first feeding..." Izraf said as he looked around before looking back at Rei.

"And you're still not calm yet. Truly a powerful bloodline purity you have. I know you can hear me so tell me. Would you like to join the vampire clan and rule the world. You can have all of the blood you want." Izraf said trying to tempt Rei.

"All....the blood?" Rei repeated as his craving for blood was taking over his consciousness. Rei quickly shook his head trying to get the though out before looking at Izraf and launched towards him.

"Che you will regret that." Izraf said as he launched his dark element towards Rei. Rei only grinned at opened his mouth eating the energy easily.

"What!!!" Izraf shouted seeing this.

Condensing seals into a pill of blood, Rei pushed his hands forward as the pill shot forward turning into a lance piercing the body of Izraf who had his guard down. He could only watch as Rei walked towards him with a wide grin showing off his fangs. He tried to get the blood lance out but was shocked to see his hand's burn at a single touch of the lance. Rei grabbed the lance as he cut through Izraf diagonally, bisecting the vampire king.

His wounds burn as he couldn't regenerate. Fear crept into his eyes as he saw the rest of his body slowly turn into just skin and bones as Rei drained him of his blood. Once he had finished, Rei looked over and saw Merlin and Escanor looking at him on guard. Rei could only clutch his head as he tried not to attack them. Soon, Rei could see the sun rise and Escanor getting stronger by the second. The allure of Escanor's blood overrided Rei's senses as he launched towards Escanor.

"Escanor, don't hurt him just restrain. I should be able to calm Rei chan down after some analysis on his blood." Merlin said to Escanor.

"As you wish." He spoke as he entered hand to hand combat with Rei as he knew Rei could eat all types of energy. Rei was soon overcome by Escanor as his body couldn't keep up with him anymore. Escanor pinned Rei to the ground with much difficulty trying to not let him move while Merlin took his blood sample and analysed it.

"Damn...The longer we wait the worse it would get. We need to get Rei more blood, the more the better. He needs it to calm his bloodline down, but where will we find such ridiculous amounts of blood...." Merlin frowned as she finished analysing.

"I can do it." Ban spoke up as he had finished killing one of the vampire nobles.

"I'm immortal and my blood can regenerate without stop." Ban said removing his arm guard to show off his wrist.

"What if you become a vampire?" Merlin said in worry.

"Don't worry about it, the vampire noble kept drinking my blood but didn't change. Something about me not being able to die and my immortality stops the transformation of me turning into a vampire. Now come on little guy, drink up." Ban said as he crouched near Rei and held out his wrist.

Rei bit down without hesitation and started to drink the blood presented to him. Ban stumbled slightly as the speed of which Rei drank his blood was much quicker than he had thought.

It wasn't long until the other sins appeared having killed their enemies as well. They arrived to see the scene of Rei drinking away at Ban's blood. Every so often, his bloodshot eyes would reduce slightly returning some sanity to him but he couldn't stop. It was only after 3 hours did Rei stop and fall asleep.

"Sleep well little guy." Ban said as he patted Rei's head and put his arm guard on once more.