The gates exploded open. All of his ki erupted to the surface. Krillin's corpse wobbled and waved in his eyes until he could only see the outline of his empty spirit, and that made Goku even angrier than before.

There was no peace inside of him anymore.

"Goku…," Roshi said. "Try and keep your cool. Don't let anger cloud your judgment!"

All of the old man's words annoyed him. Gave him more bloodlust. One part of his soul trembled with the heavens, but maybe that was because the entire Earth was trembling with it.

Everyone fell to their feet.

All Yamcha could utter was a weak "G-Goku?"

"Boy! Calm yourself! You're letting your emotions control you!" Roshi exploded.

Goku twitched as his hair waved and lifted.

Through his teeth, he said, "Shut up." He placed Krillin's hands on top of each other and stood up.

Then he said, "Krillin was my friend." As he clenched his fists, he added, "The world will know you can't kill my friends and escape—"

Everyone stared at the floor or at the walls as indents blew out.

"—my wrath!"

Shock rippled through everyone. Roshi knew the most how dangerous the situation had become. Goku never said these things. He wasn't the type.

But what had caught everyone off guard was the peculiar and fiery aura surrounding Goku, illuminating the whole dojo. His hair stood on end and reflected some of the gold.

Goku turned. In his eyes… nothing! There was nothing in his eyes, for they were empty and white.

Electricity cracked around his body, and tiles from the floor lifted off their foundations and orbited his body.

"I'll find Krillin's murderer and rip his head off!"

Bulma whimpered, "Goku… what are you saying?"

Roshi defied his hesitation and stepped forward, yelling, "You're not in your right mind! Calm down before you make a mistake, or else—"

A loud crack burst their eardrums. That was Goku, shooting off through the roof and disappearing into the sky.

Roshi fell to his knees. Yamcha and Tenshinhan could stared on, mouths agape.

Tenshinhan found the will to say, "His power… it's unbelievable. It felt like the whole world was shaking before him."

Yamcha added, "Goku…. What's happening to him?"

Bulma looked into her hands and shrieked when she saw she no longer held the Dragon Radar. "What happened to it? Did I drop it?!"

Not at all. Goku clutched it so tightly, his finger broke through a bit of the metal casing. He bulletted through the sky, following the signal as fast as he could. The speed strained his eyes at times, but he soon caught up with a figure.

Tambourine noticed the approaching aberration. All the clouds behind him disintegrated in the wake of a single golden dot, and a different vibe washed over the land.

"What?! What is that?"

Faster than he could react, Goku sped past him. The boy was steamy and smoking, and his hair was jagged and spiked upwards. When he turned, his pupils returned— this time taking on a green hue.

"You! You were the one who killed Krillin, weren't you?" he screamed.

Tambourine gawked at him for a second, only to grin and laugh. "Is that all? A little kid? For a moment there, I was worried you were an actual threat."

"Answer me!"

"Or what?"

Goku growled and screamed, "Or I'll kill you!"

"I'd like to see you try, boy!" Tambourine flew forward and threw a punch. Goku vanished. Tambourine gasped. He shot to the ground, waves of pain coming from the back of his head. One strike blasted him into the earth at such high velocity and force that the impact blew out a crater. His body bounced, and he used the momentary airtime to dash to his feet. He looked up, but Goku was gone. "Wha— where'd he go?"

Then he was swept off his feet by a ducking roundhouse. Goku charged his ki into his fist and threw a punch that went straight through Tambourine's chest. Blood spurted out of the mutant's mouth. Shock. That was all he felt before he passed out. In his mind, one last epithet to himself— 'Beaten by a mere child...!'

Goku let him fall dead to the ground. "That was for Krillin, you bastard." And then he came to and realized everything about himself had changed. He stared at his blood-soaked hands and noted the golden waves flowing from him. Whatever happened to him, it felt good.

And in that moment, he fell back and let the golden aura dissipate. Fatigue overcame him, as well as a tinge of hunger.

But then he smiled and said, "Krillin… I avenged you." A cloud above him seemed to take the shape of Krillin's ever bald head, and it filled him with pleasure to know that he had made things right.

Little did he know, he had only summoned the Demon. If only the Demon knew the hell he, himself, was about to face!

Welcome to Mysteries of Shenron. This is a pet project where I write stories of varying length regarding 'what if' scenarios in the Dragon Ball franchise. In accordance with the FanFiction Terms of Service, I am not allowed to accept requests. That's okay. In the end, these stories tend to revolve around relatively undiscussed scenarios. For example, there are two separate stories I wish to tell— one where Goku transforms into a super saiyan against Tambourine, and another where he transforms against Piccolo Daimao. How these fights unfold require different set-ups; thus, this particular chapter did not see both occur.
Despite this, I will not stick strictly to canon in every story. Where it's necessary, I will make changes. Also, I will not be using the FUNimation dub except in cases where I build off filler. Instead, I will be using the manga directly.
I say all this to give context.
Many of these scenarios are merely asking, "What if such-and-such were a super saiyan at this point in the timeline?" or "What if action Y were taken instead of action X?", and thus the stories themselves won't be particularly long— the longest that I have written is 1,800 words. No storyline will be multi-chapter. If you like what you see and wish to take it further, you may write your own story based on the idea I have given you.