Devotion is the main currency of Tome: Immortal Arena. Unlike Platinum, it is used to buy Guardians so that they are in-game accessible. Devotion can be earned by playing Co-op VS AI, but can be earned twice as fast by playing PvP. Devotion cannot be earned via playing Practice, apart from the Intermediate Tutorial (100 Devotion). the Devotion you earn every game is displayed in the top right corner in the stats screen after every game.