Talk:Strength of Spirit (Season 2013 Mastery)/@comment-1088372-20121216164657/@comment-4861674-20121217085605

I think it works the same way as Singed's passive - that is, the 400 is just a large juicy number for easier human calculations. In reality the bonus is going by very small intervals.

In short, I'm pretty sure it accounts for evey single point of mana, rather than only giving you a bonus every 400 mana.