Level-up screen
Big Coin Bag
Adds 25 to your gold coins total. Always picked, for the rest of the run.
What it's worth
25 gold
Straight on pickup, no conditions.
Where it comes from
Level-up screenTurns up as a level-up choice once every weapon and passive slot is full, never on the floor.
Listed in game
No. The record is flagged hidden, so the game never names it on a menu. It still happens to you; it just does it quietly.
Paired with
The level-up screen offers this beside Big Coin Bag. Take it once and the game keeps picking it for you until the run ends.