Expansion Pack

Expansion Pack is a trinket added in The Binding of Isaac: Repentance.

Effects

 * Upon use of an activated item, activates the effect of another random activated item.
 * The random effect is any activated item with charge time of 1 or 2 rooms. View the page on activated items for a complete list.
 * Timed recharge and infinite use items trigger the effect once per room. Re-entering the room will allow Expansion Pack to trigger again.