Not Getting Power boost

I won an Righteousness Rune. I Leveled the rune up to Lvl 6 placed it in a rune slot but received no power boost. Does any1 have an answer for this?

Morale runes don't actually increase power. They're simply increase the morale percentage on your heroes. A level 6 righteousness will give the hero you attach it to a full morale bar.....but not increase physical/skill attack/defence, magic attack/defence and HP. All of which increase your power.

Thank you.