Hal felt a bit peeved that he wasn't able to release his pent-up bloodlust in the end.
The fiasco wrapped up at Zeke's arrival. It turned out that a bottle of antidote was in Eli's possession for some reason, and with that, they're able to bring Allen back to his senses. Fortunately, he recuperated in an instant and was able to raise on his feet several minutes later. The students and guests inside the gallery had all their memories of the incident erased before they even regained consciousness. Lord Caspar, on the other hand, did not show up anymore, but he knew that it won't be the last time they'll see him. If anything, what he did was but the leading edge.
"Hal, I'm sorry for letting my guard down. I should've been more careful."
"Enough now, Allen. I already told you that none of us was at fault here."