What's the worst it can be? [He says with a shrug and a hint of a laugh.] Bees?

[But it's a possibility that doesn't elude him. In fact, it seems quite likely in this place, as much as Kurt wants to go into swashbuckling dreams of treasure.]

Okay, how about this. We bet the treasure, but if it does turn out to be something bad, then the loser has to get the winner something they treasure. How's that sound? It's not humiliating like the whole servant thing, and it's more personal than just giving the winner money!