Indigo had trailed after the group following the blood, more out of curiosity than anything else. There was clearly some sort of background that he was missing, being newer to the ministry. And he wasn't exactly sure how helpful he would be if it came down to a fight with whatever had left the blood trail. So he was a bit slower than the others. They had already gone through a door when he arrived, and he hesitated before following. This was not exactly what he had signed up for when he applied for the job.

Luckily more people began to arrive shortly, and Indigo stepped to the side to let them take the lead. His eyes glanced over the runes that had opened the door. That may actually be somewhat part of his job description actually. But...it seemed like the secret had already been discovered anyway. More and more people arrived, some he recognized and some he did not. One of them being his own department head. He moved a little closer, perhaps to try to explain the extent of what he knew? It didn't matter, because there were bats flying out of the door. And as he ducked to avoid them running into his face, a stray stunning spell hit Mr. Flamsteed. At least, he was pretty sure it was a stunning spell. He waved his wand over the man. "Ennervate." Hopefully that would help.