Defense of Throwing Knives
Defense, rare
This defense will have what appear to be six slim throwing knives easily accessible while using it--on bracers or gauntlets, three knives will be on each hand, while on shields or armor, the knives will be in easy-to-reach places that do not compromise the item's defensive ability. Drawing a knife does not require a bonus action, but it does require a free hand to reach and use.
The defense itself is not magical, offering no bonus to Armor Class, but the knives are perfectly balanced for throwing (+1 magical daggers), and any knife thrown returns at the end of the round to the sheath from which it was pulled, regardless of what happened to it after drawing.