Murmuring Obols are a unique currency in Diablo 4 that can be used to gamble for legendary gear. By visiting the Purveyor of Curiosities, you can exchange your Obols for a chance to win some of the most powerful items in the game. While there is no guarantee that you will win, the risk is worth the reward, as legendary gear can give you a significant advantage in battle. So if you're feeling lucky, be sure to give Murmuring Obols a try!