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.
Curse of the Blind items will be revealed, including those in the alternative route.
Grants half a soul heart upon entering a new floor.
Notes[]
On XL floors, both items and bosses are shown.
If the floor Isaac is going to has no Treasure Rooms, Dream Catcher will simply show the floor's boss.
On Corpse II, the boss will appear as a blank space; on the special Mausoleum/Gehenna II floor that leads to Home, it will appear as Mom.
If there are no Treasure Rooms or bosses on the floor (i.e. in The Shop, Ultra Greed, and Home), the dream will instantly be skipped.
On The Void, the Dream Catcher will show all the bosses that can be found in the various boss rooms, starting with Delirium.
Dream Catcher cannot show glitched items generated by TMTRAINER. Instead, it will just show The Sad Onion.
Dream Catcher will show a poop in the Treasure Room if there are no item pedestals in the room.
If the player is not interested in the item of the Treasure Room and has no way to reroll it, then he should not enter the Treasure Room at all to increase the chances of encountering a Planetarium
Interactions[]
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.
In-game Footage[]
Bugs[]
Bug!
Dream Catcher will not show the correct items in Greed Mode.
Bug!
Using Glowing Hour Glass to go back to the previous floor will keep the soul heart that was obtained from Dream Catcher.
Switch If Dream Catcher is obtained, the game crashes when the floor transition cutscene starts, in Normal/Hard mode. Also, upon entering the next treasure room after the floor transition cutscenes in Greed/Greedier mode.
Treasure Room and what Boss will be at the end of the floor.
Bug!
Glowing Hour Glass to go back to the previous floor will keep the soul heart that was obtained from Dream Catcher.
Broken Glasses unless 
More Options is acquired.
Dream Catcher is obtained, the game crashes when the floor transition cutscene starts, in Normal/Hard mode. Also, upon entering the next treasure room after the floor transition cutscenes in Greed/Greedier mode.
