"FIRE! SLYTHERIN'S... I'M ON FIRE!" Draco shrieked, changing the type of shield he had up, extinguishing the slight smolder on his outer robe. The air felt cool and moist around us, despite the fact that I had molten lava shooting out of my wand and was laying down a kind of fiery moat in front of us. Greyback stopped in his tracks as his minions crashed into each other, the closest ones shrieking in agony as they couldn't stop in time and fell into the burning pool, screaming into silence as the intense heat and fire suffocated them as they roasted alive. Serves them right for siding with Voldemort. They all should burn in hell.