It will take place eventually, so you require to know how to eliminate them-- because you can't drop them or sell them, all you can do is break them! That suggests that you need to use them to eliminate the monsters you encounters, and use them as much as you can! Considering that you can't sell them or discard them, make sure you use them as much as possible! Like that you will unlock the item slots they inhabit (you can have an optimum of 4 weapons + guards at the same time), so you can acquire a new one if you see it in the store.