Dad's Note

Dad's Note is a passive item added in The Binding of Isaac: Repentance.

Effects

 * Starts the event to ascend from the basement, eventually reaching.

How to Acquire

 * Once Mother has been defeated at least once, a special door will appear in the starting room of II and its alts (only  and, as the door does not appear on  or ).  This door can only be opened if Isaac has , , or Faded Polaroid.
 * This can be done by beating Mom then teleporting out of the boss room to anywhere else on the floor, or, alternatively, by inheriting any of the items from a previous run. Helpfully, a tinted Skull will always appear somewhere on II which when destroyed drops an . If Isaac has  it will turn into Telepills instead.
 * Interacting with this door consumes, or Faded Polaroid. If multiple are available, Faded Polaroid is preferred,  next, and  last.
 * The door leads to a special version of / II. Instead of a boss, the boss room of this floor contains Dad's Note.

Trivia

 * Before update 4.0.2, caused the guaranteed Fool card in  II to be replaced by a random pill. This is now a guaranteed Telepills.
 * Before update 4.0.2, had a chance to cause the guaranteed Fool card in  II to be replaced by a sack.