Depending on the Celestial, you'll get a special "Gift". For example, if you're chosen by Sarashwati, the goddess of knowledge, you'll absorb new information more quickly and could learn anything easily. Or, if you're chosen by Hermes, the god of thieves and travel, you'll.. well, steal anything more easily (or get caught easily). Me, i'm hoping to be chosen by Apollo. Depending on your Gift, you'll be assigned a "Class". "Class" is a unique system made by magic. They are made for implementing the Gifts. For example, as i said earlier, the ones Gifted by Hermes would become an excellent Spy Class. Or, those chosen by Ares, the celestial of war, would became a superior Warrior. Me, i'm hoping to be chosen by Apollo, Celestial of prophecy and medicine. I'm aiming to get the Priest class.