RIFT, and that means that every calling will be able to play every role in the game. The support Cleric soul (Oracle) and the healing Warrior soul (Liberator) have already been revealed, but what will Rogues and Mages get? The details were in the most recent livestream: Rogues get Physician as a specific healing soul, while Mages will be able to tank with the addition of the Arbiter soul.
According to the most recent development livestream, a great deal of internal testing is being done to ensure that all four new souls remain functional and competitive, even though they're being added before an expansion. Players can keep their eyes peeled for later in the week when the Physician and Arbiter both get revealed ahead of their test realm implementation. These four souls will be purchasable as a bundle, although no announcements on price have yet been made.