Meditation – the amount of mana you regenerate in combat as a function of your Spirit.
Also of note, you only get one set of passive talent tree bonuses: the tree in which you’ve spent the most points. Sub-speccing in another tree will not net you those bonuses in addition.
Last but not least, it's the intention of Primal Strike to let shaman play as an Enhancement at low levels. Currently when leveling in this spec, you end up just using Lightning Bolt a lot so you feel like an Elemental shaman instead. At a higher level, Primal Strike gets replaced by Storm Strike. They share a cooldown so Enhancement just won’t ever use Primal Strike after that, in the same way that Prot warriors don’t use Sunder Armor once they have Devastate or Feral druids don’t use Claw once they get Mangle.
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