This is a special module for the game, it adds a new class of mage called Wild Keeper that allows you to cast nature-based spells.

The player will be able to cast four types of spells: a strong control spell, a spell that heals, one that is like an arcane bolt but deals natural damage, and one that temporarily transforms an enemy into a squirrel.

There is also a staff called the "Root of the Wilds" that you can find in the same chest where you find the real Grimoire of Flemeth. This item fits for a druid or a witch of the wild.