Both the positive masks—Face of Cleric and Ssserpent Head—are extremely powerful if acquired early on Act 1 and 2. On the negative side: N'loth's Hungry Face remains a fairly minor penalty throughout. But by Act 3, the threat of a Gremlin Visage and the small number of remaining rooms/combats makes a roll increasingly dangerous (especially for a deck avoiding most combats). Therefore, it may be wise to gain the gold (or simply leave) in late acts, especially if your deck is reliant on Attacks.
You walk by an eerie statue holding several masks...
Something behind you softly whispers, "Stop."
You swerve around to face the statue which is now facing you!
On closer inspection, it's not a statue but a statuesque, gaunt man. Is he even breathing?
Eerie Man:"Face. Let me touch? Maybe trade?"
Eerie Man:"Compensation. Compensation."
Mechanically, he cranes out a neat stack of gold and places it into your pouch.
Eerie Man:"What a nice face. Nice face."
While he touches your face, you begin to feel your life drain out of it!
During this, his mask falls off and shatters. Screaming, he quickly covers his face with all six arms dropping even more masks! Amidst all the screaming and shattering, you escape.
His face was completely blank.
Eerie Man:"For me? FOR ME? Oh yes.. Yes. Yes.. mmm..."
You see one of his arms flicker, and your face is in its hand! Your face has been swapped.