Bards and Sound Jet

[evileeyore]

Originally Posted by Bruno

It's not in DFRPG however, so it's Not A Thing.

It could be, and for those GMs and Players without GURPS Basic, a Perk is a 1 point Advantage and you're only allowed so many of them (but there are so few in DFRPG you're not likely to hit that limit).

Penetrating Voice, Signature Gear, and Weapon Bond are Perks. In Eidoloclast's case I'd call it:

Windmill Guitar - It allows the use of a musical instrument skill to replace Innate Attack (Beam) for Sound Jet.