At the start of the game, mages have access to four trees: Spirit, Winter, Inferno, and Storm.
A character of human, elf, or qunari descent can take the mage class, though dwarves cannot. Mages play an essential role in the story of Dragon Age: Inquisition, and choosing the mage class for the Inquisitor can place them right in the center of the Mage/Templar conflict that colors the first half of the main campaign. Mages are an especially powerful class choice in Dragon Age: Inquisition and the three optional specializations the Inquisitor can learn will allow them to deal massive damage or exercise complete control over a fight.