Within a Hollow Heart - Chapter 39: Volume 1, : "The Edge of Darkness"

One of the few self-cultivator who exist in this modern world; due to an unfortunate event, completely destroyed his body in an explosion. Using all his effort to save his primordial spirit, he ended up in an strange magical world and had to start all over again. From a fallen aristocrat to the Warlord of Chaos, this can no longer be summarise as legendary; this is the life of the God of War.

DING![Ist Skill Devour Successful]______“They say a man's skills are honed over a lifetime, but what if he could devour them all in an instant?”Ryuen Takeru, a skilled, retired assassin, decides to pursue a better job that would keep him away from the dark life he once led.However, after a while, that peace was shattered when an unexpected train ride derailed reality itself, throwing him into a world and a life he had always hated.A world teetering on the brink of ruin, destroyed by an apocalypse as a result of the unending war between multiple races.Unfortunately, the post-apocalypse had already begun.Ryuen finds himself captured, exchanged, and made to serve kings of different nations.Yet fate had more in store for him.A devastating twist, capable of destroying or elevating him—the one thing he had overlooked as normal until the moment he was informed.A curse.Possible reincarnation?[Skill Devourer Activated: Plunder, Consume, Adapt, Evolve.]Nevertheless, for everything given, something must be taken—or perhaps sacrificed.

Introvert!? Me!? The hell am I an introvert? I stay indoors all day because I am afraid of getting my butt kicked.Until I contract my beast, I won’t be walking freely. This is a promise I made to myself.My name is Ryder, and I am black-marked. The planet where I live is dominated by summoners. If you guessed it, then you are right—we contract beasts from the Astral Shadow Plain and summon them at will after successfully forming a contract.A mark appears on the left shoulder of every human after a period of maturity, a mark given by the beast that chooses you. There are five different types of marks—the brown, the orange, the red, the black, and lastly, the white.Of all the markings, I was marked black. I was chosen by a supreme demon monarch of the Astral Shadow Plain—the Dracogon.There was only a 0.5 percent chance for me to survive the contraction process. However, with a slight twist in the original outcome, contracting a creature from the black-marked plain was nothing compared to the catastrophe I caused shortly after—I opened a link between the beasts of the Astral Shadow Plain and the planet of humans, Terra.Everyone on my planet has been endangered because of me. The fact that no one knows when the link will trigger and cause a breach that pours mindless creatures into my world makes it all the more unsettling.Now, with no other choice, I have to find a way to resolve the mistake I made—alone, just like I caused it.

Three years ago, the animals and plants on Earth underwent crazy and unexplainable changes that included transformations, reversions, and the addition of otherworldly species. And it was the start of a brand-new type of profession in the new generation of humanity – Monster Trainers, people who specialized in taming monsters.