Guard Stan:
Oh, you picked a Manak's Silver dryad. Now how should we trade? You can trade 1 Manak's Silver Dryad for 10 Silver Golems and 10 Silver Fairies. Or, you can play the game that is popular among collectors and obtain it at a better bargain...
Trade it at the standard rate.
Play the game [Get it correct on the first try - 3 Silver Golem and 3 Silver Fairies]
Play the game [Get it correct on the third try - 7 Silver Golem and 7 Silver Fairies]
Play the game [Get it correct on the fourth try - 9 Silver Golem and 9 Silver Fairies]
Listen to the game instructions.