Gregory Goyle watches his best friend burn slowly, dying with agonizingly painful cries while he was helpless to do anything. Vince died while those three little Gryffindors fled the burning Room of Requirement on broomsticks.
Of course, they turned back to save Draco and him, but it was already too late for Vincent Crabbe. He had already burned to death in front of his best friend.
And it was all the little Gryffindors' fault. If only those three had died when Vince had shot Avada Kedavras at them, this wouldn't have happened. If they had turned back earlier, Vince could have been saved.
Oh, they'd pretend like they had meant to save Vince too, but Greg knew better than that. They'd waited until Vince died, and then they'd turned back to get him and Draco. They couldn't bear to see someone who was superior to them live, so they'd let him die.
He couldn't do anything to get them back until they were out of the Room. As much as he hated it, his life was in the hands of the blood-traitor and Mudblood for the moment. But he'd watch them carefully during the battle. He'd make sure that they didn't die. And just when they though they were safe, he would strike.
He would make them suffer like Vincent had. He would see them quail in terror and fright. He would have his revenge.
For Vincent.
For:
The Jigsaw Puzzle Challenge
The If You Dare Challenge, Prompt 643. Sweet Revenge