Adam_K47xx

Out of countless Souls, ten were chosen to be reborn as Monsters into the Higher World. 
A World much different than ours, filled with Demons, Devils, and Mythical Creatures.
Ten Chosen Souls, Ten Chosen Candidates. For what they are Candidates, remains a mystery. 
"Weaklings shouldn't worry about such things."
Indeed, only the strong can survive, which is why, for ten Candidates, ten Dungeons were built. 
Raise your strength, get used to how things operate in a World of Monsters, and perhaps you, then, will be worthy of the answers you seek.
One of those Candidates had been given, in his previous life, the name Mark. 
But such a name doesn't mean much. 
After all, he is, in this Higher World, better known by his Titles.
The Devourer & The Evolving Monster.

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More info in the pinned review below!

Reborn As An Evolving Monster

I mostly watched others play-

An unquantifiable amount of time earlier,

"Alright. Looks like everyone is here." An adult whispered as he stared at the notepad in his hands.

The man was plainly dressed. Sneakers, a baggy sweatshirt, and greenish sweatpants.

He was rather old, so it was strange for him to be a PE teacher.

At least, that's what the twenty-four children seated on the ground in front of him thought.

You know I'm the fastest in the school right-

I really don't feel like-

"Quiet, kids." The teacher clapped his hands together, bringing back the students' attention to himself. "We only have about an hour today so... We'll play matches right away."

PERFECT, WE'LL DEFINITELY WIN THIS TIME-

"Umm..." Feeling a tinge of awkwardness, the teacher stared at the piece of paper he had pulled out as he talked. "Mark?"

Watching Others Play