This can happen one of two ways: (1) the door becomes unlocked on the battlefield or (2) the door becomes unlocked as the Room enters the battlefield because you cast the corresponding half
Have all those binders be the same size/brand so they fit on the same shelf space
This makes it a risky bet in the format right now, especially with how the current top decks are looking
Yu-Gi-Oh Trading Card Game (1999) Another game thats been part of the cultural landscape for decades, Yu-Gi-Oh first launched in Japan in 1999, then headed West in 2002
This is a very special binder too as the original owner plastered the inside covers with a ton of cool stickers including puffy Ninja Turtles, Rescue Rangers, Alf, prismatic monsters, Roger Rabbit, Muppet Babies, Batman and the Simpsons characters