Using this Cardfight!! Vanguard Nation’s Vault is easy. First, open the vault by gently pulling against the magnet. Place your deck of up to 50 cards, whether single or double - sleeved, inside the main compartment. You can put your special sleeved cards in the two protected pockets. Use the drawer to keep Power Counters or other small accessories. When closing, make sure the magnet aligns properly for a secure fit. To maintain it, keep it away from sharp objects that could scratch the surface. Clean it with a soft, dry cloth if it gets dirty. Avoid exposing it to extreme heat or cold as this may affect the magnet's strength and the overall quality of the vault.