Chargers Spell - Useless?

[Harakiri]

When i read the description and the upgraded levels of the spell - it looks like it will always restore the mana which was used to cast the spell in the first place, and return a little rage - e.g. 3 5 and 6 and level 3 - which seems very weak..

Or is it 3 5 6 mana per rune so max 9 runes * 6 = 54 mana/rage - which would seem OP


NM - it is indeed the latter but these are little balls dropped on the playfield - i just tried level 2 with my warrior maiden and could easily pick up 5 because she has so many action points