"Sectumsempra!" Harry shouted at the raging monster charging towards him but his spell had only severed its great massive horn. The bull, half man with its bulk of a body staggers back and snorted a steam from his flaring nose. Think, Harry, think. He aimed his wand weakly at the bull, the Minotaur; he knew that, he'd seen it in one of his books at Hogwarts. What would Hermione do? He asked himself, hoping to find the knowledge of his friend.
"Hey!" Someone shouted at the back of the bush, appearing with a sword ready from his hands. His eyes glinted of both excitement and courage, burning green against his black shaggy hair, from the looks of him and his ragged and torn orange shirt; he's been there all along, maybe fighting some other monster in the vast forest. "Leave the mortal alone!" He shouted a challenge and the Minotaur turned to him. Nose flaring, the monster readied to charge, kicking the dust from its hind legs and his massive hands ready to strangle the muggle with its weapon.
Harry stood feebly, his arms wounded as the bull thrust into it, only a second he side-step to avoid its horns directly aiming for his chest, he could have died if he was slow. Harry knew that too.
The Minotaur ran as fast as bullet and any spells Harry had drifted into since, attacking the muggle and ready to kill him only then he knew what to do, "Impedemienta!" Harry roared, sending a jolt of red light from his wand, hitting the Minotaur squarely at its back. The spell did what it was supposed to do. The monster slowed down, his charging came into a slow phase walk.
The stranger shouted something but Harry doesn't know what he'd said. He, with the tattered orange shirt charged against the bull, piercing his sword against the bull's chest and it came prodding from the back, blood ooze from it and the Minotaur shouted in pain and then he turned into dust, blown into the air.
"Nice trick you got there." The stranger smiled and bowed down to get what remains of the bull, the large horn. "I'm Percy. Percy Jackson." He announced and came to Harry, holding his free hand out for a shake, grinning.
Harry tucked back his wand at the back of his trousers and met his hand, "Harry Potter."