Disclaimer: I own nothing; J.K.Rowling owns everything. This is an early works; a wee bit shoddy.
Dolohov retrieved the wand out from his long, shimmering robe and yelled “Stupefy!” Caught unaware, Remus hastily pulled his wand out, but to no avail. The stunning charm hit him square in the chest, sending him soaring towards the rubble. Dolohov closed in, eager for the kill, relishing the moment, when Luna Lovegood sent a disarming charm towards his wand-hand, knocking his wand a few feet away. He cursed internally at his apparent weakness and the girl’s exploitation of it. He dove towards his wand at the moment Remus recovered and they both leapt up. Dolohov waved his wand in a slashing motion and purple flames erupted from his wand. Remus chose that moment to yell “Expulso!” The rubble beneath his feet exploded upwards, deflecting Dolohov’s spell onto the boulders. The boulders, pushed by both spells and aflame, flew upward. Dolohov yelled “Reducto!” causing shattered pieces of rock to rain down upon the inhabitants of Hogwarts. Dodging the incoming rocks, Remus cried “Obscuro!” A wide, black blindfold appeared across Dolohov’s eyes and he vanished it with the flick of his wand. Remus yelled “Evanesco!” vanishing the rubble he was standing into nothingness. He fell over with a bang, but on his way down he muttered “Serpensortia!” A long, elongated snake leaped out of his wand and slithered menacingly towards Remus. Remus summoned a mongoose and yelled “Opugno!” As the two creatures battled, Dolohov and Remus exchanged fire. Bright fiery sparks left from both opponents wands and the spells collided with such force that a great boom emitted from the explosion. The shockwave blew both sides back a step. A silence fell upon all for a precious few seconds, and both defender and attacker looked in wonder at what had produced such a noise. These seconds were quickly over, as Dean Thomas had shot a stunning spell into Yaxley’s pudgy face. The battle resumed with a renewed ferocity. They aimed to kill. Dolohov pressed this current split-second distraction by sending a jelly-fingers jinx at Remus’s arm. Fumbling, Remus sent off a leg-locking jinx in Dolohov’s general direction. Dolohov dodged Remus’s wobbly leg-locking jinx with ease and yelled “Avada Kedvra!” The curse hit him square in the chest and Remus sprawled back and slumped lifelessly against the rubble with a strange- almost peaceful look on his face, somehow relieved. Remus’s mongoose vanished and the snake hissed ecstatically as Dolohov moved on to other target, to avenge his wounded pride.