The effect includes instances where pedestal items would be replaced with something else, such as the Pica Run challenge. If there is not a blind equivalent, both items will simply be shown.
Its effect can work on the same floor it was picked up on if the Treasure Room hasn't been entered yet.
Works in both Treasure Rooms in Greed Mode.
Synergies
Damocles: An additional visible item will be generated from the blind item.
Devil's Crown: Both items can be taken, but still need to be paid for, and one will remain blind if not on the alt path.
Interactions
Golden Horse Shoe: The second item will always be blind if not on the alt path.
Treasure Rooms.
Greed Mode.
Damocles: An additional visible item will be generated from the blind item.
Devil's Crown: Both items can be taken, but still need to be paid for, and one will remain blind if not on the alt path.
Golden Horse Shoe: The second item will always be blind if not on the alt path.
More Options.
Broken Items 
Options 
The Binding of Isaac: Rebirth
