"What are you standing around for? Summon your Patronuses!"
Aberforth was already the first to wave his wand and summon his Goat Patronus.
Unfortunately, even among the Aurors said to comprise Britain's finest wizards, not everyone could summon a Corporeal Patronus. As for those Aurors who knew how to use the Patronus Charm, Aberforth had gathered them earlier.
The moment they heard Aberforth's shout, they snapped out of their shock. Remembering what Aberforth had told them, they all waved their wands and summoned their Patronuses before the Dementors could enter Hogsmeade.
Once the Dementors entered Hogsmeade, trying to summon Patronuses under their pressure would become more than one or two levels harder.
And if they failed to Expel Dementors immediately, they would be at a complete disadvantage in the coming clash with the Dark wizards.
When the enemy was prepared, the Death Eaters' Three-Pronged Attack might not work.
There was no denying it.
For wizards who had not mastered the Patronus Charm, Dementors were undoubtedly deadly. But once their opponents noticed the Dementors' approach and summoned Patronuses in advance, it was the Dementors' turn to run into an iron wall.
The deathly black tide formed by the horde of Dementors crashed like raging waves against the reefs known as Patronuses, only to be hurled back by an invisible force.
After a single clash, the Dementors were defeated, chased in all directions by the Patronuses.
The depths of Hogsmeade night became warm again, but the Aurors felt no joy. They all knew this was only the beginning.
Something seemed to flash across the sky. Then, a house in Hogsmeade was suddenly blasted apart by A Surprise from the Sky.
As the Aurors all looked up, more lights flew toward them from afar. Fireballs traced elegant arcs through the air, and a