"I don't know that I would say we were deceived. There are two parts to that quote. We know our enemy well enough to expect that they had laid traps. We know ourselves well enough that we allowed Scathe to enter, being one of the more likely to be able to recover from such a trap without injury." Ved says to Kel, whilst pulling his pipe out and packing a small pinch of tobacco into it.
Holding his pipe in one hand Ved makes a series of arcane gestures and rote incantations. His eyes flash purple for a moment then fade to their normal, if disguised, state. With another wave and quick incantation his pipe begins to smoke in his hand.
Spoiler: Crunchy bitsCast detect magic and continue looking around. Use Prestidigitation to light pipe. Hoping that the smoke from the pipe may accentuate any draft coming through any secret doors.