Answer:
Do what he says and you'll be fine, don't and you lose the game.
There are 30 cows and 28 chickens. How many didn't?
What has a single eye but cannot see?
What begins and has no end? What is the ending of all that begins?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.