This is a story I have uploaded on AO3 which I am bringing here as well. This version of the story will have some altered scenes within chapters in an attempt to meet the website's age rating requirements. If you wish to read the original version (I will try to make the difference not too big), please go to AO3 and look for this story under the same name.
"You have failed me, boy."
A devastating eruption of agonizing, violet heat.
"But I shall admit, it was foolish of me to have placed an ounce of faith in that hopeless fantasy of yours."
Pain. So much pain.
"You are an ignorant sapling, amidst an infinite woodland of ancient knowledge and power. Your ambitions are trivial, childish... that is what you are."
First, there was darkness.
"Death is a luxurious path, but it is often followed by those undeserving of its mercy."
Then, nothing.
"After failing to carry out my command, I cannot allow such a gift to be bestowed upon you."
The darkness was returning. But this time, he felt it coming.
"I promised you an eternal punishment should you disappoint my expectations."
He was waking up. Someone was tossing cold water over his bare body.
"This is the beginning of such a promise..."
There was a large, blurry figure shouting before him. Something sharp prodded the bone of his shoulder.
"..and I never go back on my word."