Talk:Shivak/@comment-89.213.27.24-20150103154347/@comment-3241231-20150103213738

If I had to guess, it's probably not a consistent X levels, since the values are likely rounded values based on scaling from level 4 to level 50. (A lot of the irregular patterns for heroes with upgrades, like Orc King's critical chance and Aethyx's Poison values seem to follow a pattern like this).

In Shivak's case, the level 50 target appears to be 120, so you need to increase 60 in 46 levels. The levels in the table so far would fit the formula ceiling(60+(level-4)/46*60), which would fit everything that is currently in the table in the article at the moment. For illustration, I created a spreadsheet here.