Instead, an enormous dragon burst forth from the tip of his wand, causing gasps and cries of delight and alarm. The dragon’s wings beat in enormous great sweeps, carrying it through the air around the Room of Requirement - were it a real dragon, the beat of its wings would have created a gust large enough to sweep them all off their feet. The dragon did a single loop, it jaw opened wide to release a silent roar, before it disappeared into nothing above their heads.