Dwarfen instruments are made out of heavy metal alloys and are exhausting to play. Due to their sturdy nature they weight 1 (instead of 0) but can be used as a Close Weapon.
Any Bard playing a Dwarfen instrument can use CON instead of CHA for Arcane Arts.
Typical dwarfen instruments are
Bagpipes, trombones, cornettes, washboards and drums.
Dwarfen Bard Racial Move:
When you use a Dwarfen Instrument for Arcane Arts and you grant an Ally extra damage, their next attack also gains the forceful tag.
(you may start the game with a dwarfen instrument. Tell us what it is and who made it for you)