Bismuth Beggar is a machine in Fiend Folio, a mod for The Binding of Isaac.
Crushes a rock trinket, permanently destroying it in exchange for a guaranteed Soul Heart, and a 33% chance for an additional
Half Soul Heart.
Fossil trinkets have special effects when crushed.
When destroyed, has a 25% chance to drop 2-4 random coins. If this chance fails, there's an additional 10% chance for a random rock trinket.
If destroyed in The Chest or Dark Room, it will always drop a random rock trinket.
Exclusive to and appears in every Golem's Subway.