Needs to be fermented.
Full material breakdown in the crafting calculator →
10 Sap + 10 Vineberry Cluster + 10 Magecap → 1 Mead Base: Lingering Eitr
Unlocks once you have stood near a Mead Ketill of level 1 and picked up each of: Sap, Vineberry Cluster, Magecap.
