Bag of Instrument

This bag functions the same as a Bag of Holding; however, it cannot contain anything besides musical instruments. In order to use this item, the user must roll a d20 to reach in and pull an instrument out. Whatever number on the d20 they rolled, they will gain temporary proficiency with the instrument for 1d4 days and cannot pull another instrument from the bag until those full 1d4 days are over.

The user does not know that there is more than one instrument in this bag before and after attuning to it, and if/when questioned about knowing so many instruments, the user will insist on knowing only the one (taken from this bag) they have proficiency with.

[roll]1d20[/roll]

[roll]1d4[/roll]

Notes: long rest