Forest Native 2014
1st-level transmutation
While in a forest, you touch a willing creature and infuse it with the forest’s energy, creating a bond between the creature and the environment. For the duration of the spell, as long as the creature remains within the forest, its movement is not hindered by difficult terrain composed of natural vegetation. In addition, the creature has advantage on saving throws against environmental effects such as excessive heat or cold or high altitude.
Source: Deep Magic for 5th Edition (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details