In the original plot, Alexander gave Serena perfect blood so that Serena could walk in the daytime.

Serena has great passion for him.
But now, because of Du Yu’s intervention, Alexander is the dark origin of everything for Serena. Without Alexander, there would be no werewolf vampires.
If there were no werewolves and vampires, her family wouldn’t be slaughtered for it
Alexander is just an old man with all his sins.
It doesn’t matter to Serena whether he lives or dies. What matters is that she will help Du Yu make vampires, werewolves and all dark creatures disappear from this world.
As Du Xue closed the door of the laboratory, the whole temporary shelter fell silent again.
I looked around in confusion, and Du Yu and Serena fans said awkwardly, "Master, I want to go back to the things to see the stars … crawling …"
Du Yu will touch the confusing income with a wave of his hand.
Du Yu and Serena are the only vampires left in this whole temporary shelter
"What should we do? ！”
"What do you say?"
"What I call this depends on you!"
"I also called with you …"
"Well, then …"
Du Yu cleared his throat and said, "Then let’s talk about detaining the werewolf ancestor William in prison!"! How much do you remember? ！”
Bang!
Serena turned and went back to her room when she heard Du Yu’s words, and she didn’t forget to slam the iron gate hard.
"Well … this problem? Is it so inappropriate? ! Now it’s just the werewolf leader Lucian, the werewolf ancestor William! Is it wrong for me to focus on this side? ！”
"Is it wrong?"
Du Yu shrugged awkwardly and found a room to have a rest.
After all, since he came to the night to talk about the world, he has been busy for the past night plus a morning.
Although Du Yu’s mental strength did not feel so tired, he also habitually wanted to sleep for a while.
A few hours later,
Du Yu’s door was knocked on and opened, not Serena, but Du Xue.
See Du Xue a face of serious pull Du Yu went to the laboratory and don’t explain with Du Yu.
"Hey … can you explain what’s going on first?"
Du Xue ignored him and pulled faster.
"What’s the matter? ! Is there something wrong with the experiment? In such a hurry? ！”
Du Yu eyebrows a wrinkly also accelerated the pace.
Stepping into the laboratory, Alexander has "disappeared" and there are many more bottles and jars in the laboratory, which are divided into five parts with bright red blood and perfect blood.
Du Xue pointed to the perfect blood injection and said anxiously.
"Try to see if you can get them into things!"
Du Yu hurriedly put his hand on the perfect blood injection, and the system sounded in his ear.
"ding! The perfect blood injection is developed by Du Xueli Alexander Perfect Blood Institute, and the perfect blood serum can be 6/6 of the number of one gene or lineage at a time.
"The serum can be used repeatedly"
It worked!
Du Yu’s heart is happy with the VR system, which is the best proof
Every time his gene or pedigree is used at the same time, he can also have that gene or pedigree.
In this way, Du Yu’s plan of integrating all excellent genes to create a perfect lineage is not much different.
But the only difference is that there are five perfect blood serum in front of Du Yu.
Jia got the perfect blood serum with the same effect from Alexander.