Ok, how about this for Lore.

Start with an actual arrow. See the arrow. Feel the arrow. Be the arrow. Conjure arrows at will from thin air while nocking the arrow.

It's a Deep Bard Secret, similar to the Deep Secrets of Dragoons, Warriors, Paladins and Ninjas.

It is never written in books, or seen in quests.

It's the same sort of Deep Secret for most jobs/classes to provide Actions and Traits that appear magically in thin air whenever you advance. It's why you have that silly stance after learning every new Secret during the class/job quests ...