In the middle of a mildly dense forest we see a house inside that house is 3 children and two adults all having fun and laughing, but of course this wouldn't last long, in fact it would barely last another year the small boy knew this of course and knew he was the problem but he decided to let fate do its worst and it did the boy started getting severely abused his mother and uncle cared though but one day the mother went on a mission and she never came back making the abuse worse until it was more of torture the small boy didn't cry though he couldn't or it would be worse. He started hearing voices at some point telling him to rip and tear them apart, rip and tear them limb from limb but he still loved them, he knew it was one-sided and they would never love him back but he still chose to love them. But the one incident made him start listening to the voices was the fact that his uncle started abusing him his one family member that loved him was gone and was replaced with an abusing drunk uncle the voices started telling him things he couldn't make out
"Kar en tuk" was what he was told he couldn't understand but he believed it meant rip and tear in an ancient language he learnt of before the abuse. It was the language of the night sentinels some say they can hear their voices, but the boy never believed it but the books said they only chose one every few centuries to attempt to slay the darkness but what was the darkness and why did they chose him, he wasn't special at all, he had nothing special about him so why? He said to himself "If can't even fight my abusers how am I meant to fight ancient evil that not even gods can kill" suddenly one of the voices said " because you are stronger then gods" another voice started saying " Upon all the evil that hell can conjure" The boy started standing up "all the wickedness that mankind can produce" He walked over to the door "We will send unto them only you" He punched it off it's hinges "Rip and tear… until it is done" The screen turns black and the Doomslayer symbol slowly burns into the darkness with voice saying kar en tuk slowly converting it into rip and tear.
Rip and tear until it is done.