Guard Stan:
Ah, Manak's Silver Dryad. I will give you one Manak's Silver Dryad for 10 silver fairies and 10 Silver Golems. Or perhaps you would prefer a game of chance?
Accept standard exchange rate
Play game. [Guess correctly in two tries - 3 silver fairies and 3 Silver Golems]
Play game. [Guess correctly in three tries - 7 silver fairies and 7 Silver Golems]
Play game. [Guess correctly in four tries - 9 silver fairies and 9 Silver Golems]
Explanation of ‍game