How do you enter the end game door in void quest in persona 4?

To enter the end game door in the Void Quest dungeon in Persona 4, you need to defeat all the Shadow minibosses on the various floors of the dungeon. After defeating them, you'll obtain the necessary key items. Once you have all the items, return to the door to unlock it and proceed to the final area of the game. Make sure to prepare adequately for the challenges ahead!