Arcane Vault

A pair of large doors open near the caster, granting access to a vault that can store magical items. If an item without magical property is stored in the vault, it is lost forever the moment the doors close. upon it's creation the caster can allow entrance to any number of individuals they choose. as a bonus action a person with permission may summon the doors and access it's contents. Another unique feature of this spell is the collaborative casting for it, If multiple individuals put spell levels into the casting, the total spell levels used is the level of this vault.

the vault by default can hold 8 magical items of any size. for each spell level higher than 2nd, the capacity increases by two.