Invocation represents a mage’s ability to successfully cast spells learned from their company or mentor.
The skill encompasses a plethora of magical principles from comprehending the philosophy underlying how that type of magery works, to being able to achieve the necessary mental state to manipulate reality. As the value of this skill increases, so does the capability of the mage to create greater changes.
The Intensity of a magery spell is equal to one tenth of the Invocation skill used to cast it.
For further details see the Magery chapter.