Dead Boy's Game and The Broken Vow - Magical Rome Universe, #1

Dead Boy's Game and The Broken Vow is the first book of Magical Rome Universe. Late at night in Magical Rome, an elderly druid plunges two baby boys into a cauldron bubbling with a mysterious potion. One boy is alive; the other, dead. Instantly, a spectacular magic begins inside the cauldron - life diffuses from the living boy to the dead. Thirty-seven years pass . and the two boys, oblivious of their magical past, grow up believing that their beloved Rome will outlive time itself.
But when the ancient powers commanding their bygone adventure come calling, carnage rains upon the great city. And our heroes' lives intertwine once again. Will the two men defend the city of their birth or hurl Rome into a never-ending abyss? Thirty-seven years after a feat of impossible magic, a deadly game begins in Magical Rome.