Talk:Nami/@comment-10977589-20130731043803/@comment-4677525-20130731160330

It's a powerful burst heal that doubles as ranged harass. Also, unlike most heals, tactical usage can enable damage/healing on multiple targets. With all the utility it provides on a relatively low cooldown, it makes sense that it would be gated by a hefty mana cost. It isn't intended to be mindlessly spammed like Sona's heal.