I'm just going to say that the reason the demon summoning didn't work was due to the fact nowhere in Sorin's sheet did it say he had that nor did you PM me ahead of time to warn me about it, which would be common courtesy in scenarios such as this. Also the fact that the demon would have been more troublesome than the dragon to deal with too considering how much power it apparently has and I wasn't sure if it'd turn on the rest of the party.