The guam-marr vial is made by using a clean marrentill on a guam vial, or by using a clean guam on a marr vial. It is required to produce the waking sleep potion, which is required for the Lunar Diplomacy quest.
The next step is to use a ground tooth on the guam-marr vial.
|Item quantity required||1|
|Base junk chance||98.9%|