Stone Mask what does it do after buying everything?

[OmegaSol]

Stone mask increases the amount of gold you earn. But after you purchase all the items in the game does it serve any other purpose?

If not wouldn't the item now become a hindrance taking up a valuable level up slot choice for no effect?

[Matthew]

You use gold to purchase golden eggs, but ye still worthless because you can just use queen Sigma with wicked harvest arcana and she will have a ridiculous amount of gold bonus and get millions of gold even without the mask.

[Cahos Rahne Veloza]

Stone Mask is also the passive Item you need to pair with Ghatti Amari (The Cats weapon) for the Vicious Hunger weapon Evolution.

[Vatzfu]

if you are playing maps like inlaid library or moongollow, fill your slots with gear and THEN pick them up, they'll add to your gear slots despite any limits imposed, the same happens with any relics found natively on maps