The Evil Prince Needs Blood

Jian Zhang was known as a useless prince. Much different from his brothers who are very strong and respected by the people.
One night, the kingdom was attacked. And the attackers were aiming for the Jian.
Prince Jian who couldn't fight back, could only run away and ended up tragically. He jumped into the abyss.
But, everything changed.
After 4 years of being declared dead, Jian returned.
The current Jian is not what it used to be. He has a mysterious power that gets stronger at night. And now, he can take revenge for all the injustices he has received.