[quote]Do they serve a purpose?[/quote] Yes. The "Gateway Between Worlds" bounty you get from her costs 40 Dark Fragments and you get the offering to the Oracle when you complete it. However, that requires going into the "Blind Well", repeatedly. And for that you'll need to buy the Tier 1 "Charge of Light" for 5 Dark Fragments, the Tier 2 "Charge of Light" for 13 Dark Fragments and the Tier 3 "Charge of Light" for 20 Dark Fragments. You'll also need the "Unstable Charge of Light" which is 35 Dark Fragments. Depending on how you do (requires multiple Guardians) you may need to buy more of the aforementioned to get the bounty to 100% completion. See, they couldn't have made it any easier. ;) Well, since I screwed that up (thanks to [b]FatBabyDragon[/b] for pointing it out), I'lI try and answer the question you were actually asking. :| You can give 25 Baryon Boughs to Muninn in order to obtain a Tier 2 Charge of Light, and 50 Baryon Boughs for a Tincture of Queensfoil. You need the Tincture of Queensfoil to see things you would otherwise not see. The Awoken seem to be into psychedelics. Just going to the Dreaming City makes me want to play my 100 Greatest Psychedelic Songs of the 60's CD's. I'm even wondering when the Hare Krishna will show up and start handing out copies of the Bhagavad Gita. :D So thanks to someone at Bungie for that. :)

Baryon boughs are used by the ahamkara vendors in the harbinger’s seclude side of the confluence (look it up if you don’t know what that is). 25 is good for a tier 2 charge of light for blind well and 50 will get you a queensfoil tincture.

WHAT IS IT GOOD FOR ABSOLUTELY NUTHIN GOOD GOD YALLL