You'll end up with a ton of Murk just by playing Elden Ring Nightreign normally, but don't spend it all at once. More expensive items appear in the Roundtable Hold as you progress through the game ...

Don’t call her Brandy no more — call her your highness. Brandy didn’t come to play with her take on Jack Harlow‘s “First Class” after the white boy rapper couldn’t recognize the R&B ...

As you start to earn a decent supply of murk, check out the Small Jar Bazaar to see what items he has for sale. Murk can also be used to buy garbs for your Nightfarers, changing their appearance.