Rulings

• 2014-02-01
  Kiora's first ability can target any permanent an opponent controls, not just one that can deal or be dealt damage.
• 2014-02-01
  Once the first ability resolves, the damage prevention continues to apply even if that permanent changes controllers.
• 2014-02-01
  Kiora's second ability allows you to play an additional land during your main phase. Doing so follows the normal timing rules for playing lands. In particular, you won't play a land as that ability resolves. The ability will fully resolve (and you'll draw a card, perhaps a land you'll play later) first.
• 2014-02-01
  The effect of the second ability is cumulative with other effects that let you play additional lands, such as the one from Rites of Flourishing.
• 2014-02-01
  If Kiora leaves the battlefield after her second ability is activated but before it resolves, you'll still be able to play an additional land after the ability resolves.