I popped into the Ministry with Herpy on my arm, my own wand out and ready to kill Dolohov. Looking around, I saw I was standing just behind a modified blood-and-rune inscribed shield that was of Draco's design, and Cormac and Katie were firing conflagration rounds towards the fast-moving vampire-inferi (vamp-feri?) hybrids as my step-son and Severus were dueling Trixymort and Antonin. I knew I had burned all of the Inferi that were at Azkaban, so these must have been instantly created from the Sleeper Ministry employees that we had shot unconscious. It only takes one of those damnable undead to bite a few of the unconscious "Sleepers" and presto, instant undead army.