Every player has his own Hero in Emporea. This Hero commands player's armies, oversees the construction of buildings and casts spells.
For each level of their Hero players gain 1 talent point which can be invested in one of the talent trees - Warrior, Mage or Builder. These talents give player various bonuses (depending on the skill tree) - so called Stats.
Heroes can also equip powerful Artifacts, which provide additional boosts to player's Stats. Artifacts can be accessed via the Inventory screen and heroes can have multiple "Sets" of artifacts equipped. These Sets are Fighter Set, Economy Set (for collecting resources and doing research), Builder Set (which includes troop training) and Magic Set (for collecting mana and casting spells).
Hero's Stats are therefore a combination of his Talents and his Artifacts.