Wondrous Item (cloak) , Rare (requires attunement)
This cloak has an interior space hidden within its fabric that can be opened and displayed by an attuned wearer of the garment. The cloak can hold up to seven swords, none of which can exceed seven feet in length or 25 pounds in weight. While contained or displayed within the cloak the swords are considered weightless, and their scale is adjusted to the size of the cloak. Retrieving a sword from the bag requires an action.
See rules for "Bag of Holding"