Card Reading

Card Reading is a passive item added in The Binding of Isaac: Repentance.

Effects

 * At the beginning of each floor, spawns 2 portals that each lead to either the Boss Room, Treasure Room, or Secret Room.
 * From Chapter 4 onward, only 1 portal will spawn.
 * The portals will disappear once the starting room is left, whether a portal was taken or not.

Interactions

 * Bloody Crown: Makes a second portal spawn in Chapter 4.
 * Holy Crown/Wicked Crown: Makes a second portal spawn in Chapter 5.

Trivia

 * This item may be a reference to the portals in the videogame Wizard of Legend, where four portals appear after clearing the boss room, that teleport you to important locations (shops or the start point) depending on their colour (red, green, purple, and turquoise).
 * The subtext "A link to your future" is very likely a reference to the game The Legend of Zelda: A Link to The Past.