[Beloss]

Hello, Beloss here. 20, living in Cal and a big fan of Civ games and Age of Wonders before I was introduced to Dom. Relatively new to Dom 3, have played a long hot seat against a friend but we were basically just throwing troops at each other with minimal utilization of the finer points of the game, so I'm basically still a beginner.
One question I was curious about (And considering the cost of gems I know that this would be suicide in any competitive environment)but I was surprised to find that its possible to raise a units magic power over 9, and into 10 and even 11. Is there any benefit to this? Any bonuses one would get to having Fire power 12? I know that the more death you have the more undead troops you can lead, I also know that higher Nature lets you feed more live longer, but do you get any spell bonuses to having scores above 9?