There are many unbalanced abilities, but overall, you grasped the concept. There's a zodiac button in the hero's menu; clicking it opens a window. On the left are the negative aspects – a separate topic, which I'll address soon. On the right are the positive aspects. Both sides are divided into three categories: blue, green, and yellow cells. A penalty is indicated by a red border around a cell of any color. So, blue represents bonuses for units during battle. Green represents bonuses for the hero on the global map. Yellow represents magical bonuses/penalties. This could be anything from a week-long bonus to the summoning magic skill to a random spell or mana regeneration per day. I'll make a more detailed list soon (maybe tomorrow).