Not long after she finished speaking, Penelope suddenly stopped talking. Her brows drew together as she looked down to the right. Below, amid the dense gray fog that had swallowed the ground and spread like a vast sea, sixty or seventy streaks of light flashed rapidly beneath the ocean of mist.
"Ground ahead of me, seven o'clock! Shields!" Penelope turned her head and shouted into her collar badge. Her wand had already spun in her hand, and a Super Protego shield was set at an angle beneath the Dragon under her crotch.
Though Hermione was a little slower than Penelope, who was an Auror, she had also begun to sense something wrong. Hearing Penelope shout, she immediately gave up her probing and began chanting Super Protego as well—and continuously. The shield placed beneath Drogon kept expanding, and soon joined with Penelope's, firmly protecting them and the Dragons beneath them.
Penelope's first shout also served as a warning to the elite wizards on the backs of the other Dragons.
Aside from those who had just happened to spot the situation, the wizards who still had not noticed what was happening, under long training, reflexively chose to obey the order first. They cast defensive Charms on themselves and the Dragons beneath them, and only then noticed what had happened.
Then blue-white and green Charms intertwined and pierced through the heavens and earth shrouded by the vast curtain of fog, shooting densely toward them. These Charms came in fiercely, with no lack of Unforgivable Curses such as the Imperius Curse and Crucio among them, while the green light of Avada Kedavra became the dominant color.
At the same time, the whistling sounds of objects tearing through the air grew louder and louder. Spinning flying axes and straight javelins came shooting densely almost at