During the transition between floors, Isaac's nightmare shows the item that will be found in the Treasure Room and what Boss will be at the end of the floor.
Blind items will be revealed, including those in the alternative route.
Grants half a soul heart upon entering a new floor.
Devil's Crown: Dream Catcher will show what the Treasure Room will have if Isaac chooses to enter the room without the crown.
More Options: Dream Catcher will not show the third item if going to alt path.
Red Key: When on alt path if a bonus Treasure Room is encountered before the regular Treasure Room, the left item from the dream sequence will appear as part that reward pool, but the right (?) item will still be in the regular Treasure Room.
Mausoleum/
Gehenna II floor that leads to 
Home, the boss will appear as Larry Jr.
The Void, the Dream Catcher will show all the bosses that can be found in the various boss rooms, starting with Delirium.
TMTRAINER. Instead, it will just show 
The Sad Onion.
Devil's Crown: Dream Catcher will show what the Treasure Room will have if Isaac chooses to enter the room without the crown.
More Options: Dream Catcher will not show the third item if going to alt path.
Red Key: When on alt path if a bonus Treasure Room is encountered before the regular Treasure Room, the left item from the dream sequence will appear as part that reward pool, but the right (?) item will still be in the regular Treasure Room.
Bug!
