Originally posted by neuroperson:

GUCK is for upgrading your Draugr Fang Bow to Level 4. its hard enough finding guck on ground level. Hoard that stuff. it over 20 IIRC to get it to level 4. once you have 20+ then have fun with it

Thank you, but I'm already have my Draugr Bow maxxed out, so I just forgot about this. Best bow in the game, btw :)