"I guess his loyalty is dictated by money not by his race...but you're right, we cannot be sure for 100%...your choice. And yeah, I don't think it would be clever to tell him the truth...you could employ a lie yourself...there must be a better reason to search for this nesting chamber than cooking an omelette."
"It is a little sad when the truth is harder to believe than the fiction we are making up."
That's easy...we're looking for something one of the naga hid there, a piece of treasure or something, and that's where it's rumored to be hidden.
"Go ahead Daggers. I'm not objecting to the idea, but tell what treasure we could be looking for in a nest of nagas. What great or small trinket could we be looking for? A book, a ring, a shiny box?"