Widogast's Vault of Amber

You arrange the amber gemstones around a collection of objects and trace transmutative sigils above them. During the casting, you choose a command word.

Choose any number of nonliving objects within 10 feet of yourself. The objects must not be worn or carried, their combined weight can't exceed 500 pounds, and together they must be able to fit within a 4-foot Cube. An object containing a creature or an extradimensional space can't be stored.

When the casting is completed, the objects vanish into stasis, and the five amber gemstones fuse into a single Tiny amber gemstone called the vault. Faint, miniature images of the stored objects can be seen within it.

While stored, the objects don’t age, decay, rot, or suffer environmental damage. A spell or magical effect affecting a stored object continues to expire normally and isn't extended by the vault.

A creature holding the vault and speaking its command word can take a Magic action to end the spell. The stored objects then appear in unoccupied spaces on the ground as close to the vault as possible. Their appearance causes no damage.

The spell also ends if the vault is destroyed or if Dispel Magic is successfully cast on it. The vault has AC 15, 5 Hit Points, and Immunity to Poison and Psychic damage. If it is destroyed, its contents are released and the amber gemstones are destroyed. Otherwise, when the spell ends, the vault separates back into its five original gemstones.