The Gamer Was Given Prep Time

Alistar Black, 15 years old, no fucks to give, and a little edgy. No fault of his own though, I imagine anyone with the power of the gamer system from birth would be. After his mom died, his adoptive mother, Mari Shimon, found him clapping some monster's cheeks to blow off some steam.

He killed a Metaphysical at the age of 10 with his bare hands. It was the weakest class of them, but it was impressive to her anyway. Spending years in a time dilated Instant dungeon where you can't age can do that. With the [ID Create] skill maxed out, he can just about stop time when inside of it.

What's the Gamer system? Oh, it's only the most broken thing in the multiverse. It allows for infinite growth with no real limit as long as you kill enough shit. Luckily, he didn't get the full release or he'd be a god by now. Anyways, Alistar is coming back to Japan after a year-long study abroad program to attend some high school his mom wants him to attend. He learned very early not to mess with her. One time he got smart mouth with her and she teleported him to the stratosphere and back just to teach him a lesson. 

Back to the Gamer system, it basically allows you to do anything you want and learn anything you want at an exponential rate. Take cooking for example, most people take years to master their craft, but it only took him 4 months of cooking every meal to max out the skill. He could even add magical buff or debuff effects to it, but he wouldn't do that…maybe.

Now that he is back home, he has a few places to visit. Home, obviously, but there's also a certain landlocked dungeon that can only be accessed. Call it revenge, or even pettiness, but his very first dungeon was a nest of level-10 goblins. To be fair, he was only 6 at the time, but Alistar remembers…he always remembers. 

Getting off the train, he heads to a very specific park in his hometown. Right beside that rickety swing set was an invisible door that no one could enter. Alister was familiar with this door, he found it when he was just a small child and went inside all giddy for adventure. Let's just say goblins did what goblins do, and he still thanks god, which doesn't believe in, that he wasn't a girl. Now, it was time for his getback. 

He glared at the door for a few moments before going in, a nasty, evil grin on his face. 

"Alright you little green amber alerts, time to send home…hehehe." 

Alister had a habit of making himself laugh with his own jokes, spending a lot of time alone can do that. It didn't take long after entering the dark, damp, cave that he happened upon a group of the little green terrors. His grin grew, almost splitting his face from how wide it was. The goblins didn't notice him until he put his hand on one of their big bald heads. 

"Miss me?" 

The goblin's head split and squelched like a watermelon. Alister waited for them to grasp the situation they now found themselves in. 

"GYAAAAAAAAAAA!!!"

One of the group broke off and ran screaming. However, its body abruptly stopped, splitting in two. Alister stood next to his new victim, his grin never falling. The goblins could only look in absolute horror. They could have sworn they could see devil-like horns growing from his head as everything went black. 

"haha…hehe…AHAAHAHAHAHAHAHAH! It feels so fucking good! Goblin Slayer was right, this is so fucking fun!"

Alister cackled to himself as he dragged one of the corpses by the leg. Upon finding the next group…he proceeded to beat one motherfucker with ANOTHER MOTHERFUCKER!

He slew group after group, instilling fear and awe into their disgusting little hearts. The boss of the dungeon, was on his knees, seemingly begging for his life…or the pregnant women and children behind him. Alister couldn't…didn't care to tell the difference. With one hand movement, a bubble of air surrounded the boss's head, slowly sapping the oxygen or whatever other gas these vermin wasted, from its small muscular body until it went limp.

A smile still arced along his face as he menacingly turned towards the women and children, can't have the next generation wreaking havoc on anyone else that happens upon this place after all. 

68 seconds later…

"Maybe I should have saved a few and made it my personal rage room? Nah, I've got better toys to play with."