Originally Posted by
Sarasca
A hero's max BASE stat, meaning the highest stat they could possibly have without leveling through being mayor or attacks, can be up to 70.
Therefore, a well-leveled hero could have stats over 100 easily. But these are not that hero's BASE statistics.
With regard to the hero you mentioned that has a stat at 136 at a certain level, which would've been a 50-point increment (meaning the base would've been 86), there are items that you can use that will boost a hero's statistics temporarily (Wealth of Nations, The Art of War, etc.). Maybe this hero was under a bonus period for its stats.