Arena
Sam opened his eyes only after an hour when he realized that no one was around him. Except for Arman.
Even though he is not affected by whatever powder he was fed, Sam didn't show it to them, he just pretended to be asleep, to get inside.
That is because it is almost impossible for him and Arman to get any information on the Palace of inheritance without getting in contact with a city.
As for getting any information by kidnapping people from the city, it is actually quite hard to do so because, from what he saw those people on the Purple Flame horses happened to be the lowest-ranked soldiers, and from the discussion he heard the young master is trying to recruit some of them into his personal guard for training.
If even the Grand realm cultivators are only ordinary soldiers, then he would have to kidnap a Transcendent to have any chance of getting decent information out of him.