Laffey_

"Before the towers fell, before everything was consumed by darkness..."

Leo Astralis whispered to himself while traversing through the rubble of the ancient structure. 

His body bore the scars of survival, bite marks that throbbed against the coarse, blood-stiffened fabric of his clothing.

"...I wonder what the world was like."

After humanity failed to complete the Tower almost 700 years ago in time, it exploded, spreading monsters all over the word.

Even the system, which blessed humans with power, had abandoned them. Or did it?

[Run]

A singular message urged Leo to escape, yet it was short lived as was he was caught like an animal in a trap.

And just like an animal he lashed out until the very end, taking one of the captors to the grave with him.

But as darkness closed in, the system spoke again.

[One time Regression activated]
[Congratulations. You've activated the Heart of the System]

Re-Awakening with the Summoner's Class

"Focus Leo, you need to calm down"

The voice of a man he never heard before spoke to him, but how could he do what the man said if he couldn't do what he wanted?

The strange feeling in his head rang soundly and he could feel weird tightness in his chest.

He put the palm of his hand on it and could feel his heartbeat, however, it felt way slower than it was supposed to.

Besides the beat of his heart, he could feel something else, something unnatural, like a different pulse.

But it felt more electric and irregular.

"You have to time your own heart to it"

Again, the unknown man was telling him what to do. Whether because of the exploding pain in his head or because he was desperate, he decided to trust that person.

With all the strength he could muster, he tried to relax and ignore all of the pain.

Hydra