"Is this the only way into this chamber?" Karvir leans into the room, maybe taking a few steps if necessary to gain a better perspective. "So we have dead giants that seem to have been protecting some sort of ice diamond. The giants went crazy and killed each other. Or something else equally big killed them, but we didn't see any of those giant traps that were set off." Karvir stands there, thinking for a moment.
"Look, whatever this is, I don't trust it. I especially don't trust walking around in that room until we know what is going on. I think we should send in my handy dandy unseen servant and poke and prod things for a few minutes to make sure nothing drops on us."
Karvir begins making preparations to cast Unseen Servant, wholly expecting no objections to his genius plan.