Book of Ebon Tides
1-level Abjuration
You touch a drinking vessel and sprinkle acorn dust into it, which creates a shining green vessel filled with a green potion. Any creature that drinks from the goblet is protected against Shadowfell corruption for 1 day.
The protection grants several additional benefits: you gain advantage to checks used to gather food within the Shadow Realm, and you gain darkvision to 30 feet (or extend your existing darkvision by 30 feet).