Toaru Majutsu no Index - Volume 7, Prologue: Begin Action. The_Page_is_Opened.

The heavens and earth are furnaces, every living things are charcoal, and the Yin and Yang are fuel. The battle for destiny, fate, and luck between the Serpent and Sacred Saint Dragon arises. When all is said and done, will the Serpent emerge victorious or will the Sacred Saint Dragon rise up above all sentient beings?

Magic finally reached planet earth, but it was not like we expected. It came in the form of mystic energy!

After the age of awakening, all living things finally entered the path of evolution.

Mystic Beasts invaded earth, destroying the world as we knew it, but we survived as we finally gained the ability to utilize the energy that the beasts came with.

Mystic Warriors were born, and humanity finally found a moment of reprieve, but the Mystic Beasts were still winning.

Rex Vector, an apparently mystic energy-deficient sword genius who lost everything to the war turned out to be the last inheritor of an Ancient Bloodline.

On fully awakening his bloodline he was granted a system and his whole life changed for the better.

Life held much more in store for him though as the contents of his first system mission revealed a reality to him that he wasn’t sure he wanted to accept.

[You are hungry!]

[You must drink human blood within 24 hours!]

[Penalty for mission failure: Death!]

When people die, where do they end up to?I don't know about anyone else, but when I died, I arrived at the strangest Heaven of all times. And I got a chance to reincarnate with all of my memories!Jackpot!If you look away from the fact I had to reincarnate as a damn monster which is the lowest of all the bottom feeders? And I had to represent one of the worst goddesses ever!?And to make things worse, my “birthplace” was a freaking Dungeon! And not your everyday Dungeon with level 1 slimes and goblins, but a freaking Dungeon-turned-world-destroying-facility!Still, you gotta work with what you have. So see me how I survive in this crazy new world!!...But I promise I won't be mad if the bosses get debuffed. No? Damn...

“They called me a beast,”“They called me a monster,”“They killed my mother and took my sister, yet they called me the animal!”“I will make them pay!”After losing his mother and a young age, Jayden struggled with rage and isolation, getting angry at everybody and everything, while still having the dreams of crushing those who took his mother from himBut his goal was hindered when he discovered that he couldn't possess an ability, he would remain a ordinary human in a world where power was everything.Years after being sent to therapy, he returns only to get struck by lightning. But before he could die, a mysterious interface appeared in his eyes[Requirement has been met][System integrating...][Alert! Non-human genes found in host; modifying system to meet Host's genetic code][Curse has been forcefully activated][Congratulations you have acquired the Beastlord system]“Huh? What the hell is this? And what curse is it talking about?” Jayden thought as he slowly lost consciousnessHe wakes up as a new being entirely, receiving various powers and abilities related to nature and it's creatures, but the most incredible was the absolute control over beasts. Now he could achieve his goals without being stopped and get revenge for his mother. While also leading a war with the ancient beasts against beasts from beyond.....“Mother, i have finally become the animal they say i am,” Jayden chuckled, as he stared at the bright full moon“I have become the lord of beasts,” he stated, as his body began to slowly transform into a large humanoid wolf.