Blessing of vitality?

[Gigahertz]

Hi guys, i was just wondering... in the description of blessing of vitality it says "reduce mana cost per level" if i can remember correctly - but are we talking about the mana cost for THIS spell only or for all spells? i mean, it gives HP regen for melee types, but does it give us an advantage? (less mana per spell)

[Psiorian]

Just the spell in question. The blessing of might spell has the same benefit. Also ressurection