Neville's patronus, a blurry thestral, took form and spoke. "Everything is secure here at the Ministry, Harry. Unusually quiet, compared to the tactics in the last Rebellion." Harry was glad that Neville had the idea to interview the oldest portraits about how the last few Goblin Rebellions went, though apparently the "unleash an army of Inferi" plan meant that they were not simply repeating history anymore. This was escalation, perhaps seeking annihilation.