Silver corporeal Patronuses appeared one after another, relaying information about Voldemort to Dumbledore;
During this process, Wizet also roughly pieced together the outline of Voldemort's current plan.
Voldemort treated the Death Eaters as "wands." The moment he projected the Dark Mark into the sky, he had already announced one thing to the wizarding world: he had returned;
With the International Statute of Secrecy in place, even if some wizarding communities had forgotten Voldemort and what the Dark Mark meant, the various Ministries of Magic would still have to send people to investigate what had happened on-site;
That was Voldemort's objective. He wanted to use the highly conspicuous Dark Mark to achieve an effect similar to a signal beacon, gathering as many wizards as possible.
Most Death Eaters who had not been thrown into Azkaban were so-called "traitors." They usually clung to the hope that they could escape the England wizarding world and begin new lives elsewhere;
When Death Eaters of this sort found themselves unable to control their actions and were forced to project the Dark Mark into the sky, they would often once again think of hiding or fleeing;
Yet such thoughts were exactly what Voldemort wanted, because he was the one who controlled the Dark Mark. No matter where these Death Eaters fled, the Dark Mark would appear in the sky.
One could even say that Voldemort was eager for these Death Eaters to do exactly that;
After all, when the Dark Mark appeared in one area, aside from attracting the intervention of Ministry of Magic employees, it could only draw the attention of wizards in that particular region;
Once these wizards began to flee, the Dark Mark would move along with them. That meant it would appear in even more places and draw the attention of more