Kiora, the Crashing Wave

[+1]: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls.
[−1]: Draw a card. You may play an additional land this turn.
[−5]: You get an emblem with "At the beginning of your end step, create a 9/9 blue Kraken creature token."

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Duel Decks: Elspeth vs. Kiora

+1: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls.
−1: Draw a card. You may play an additional land this turn.
−5: You get an emblem with "At the beginning of your end step, put a 9/9 blue Kraken creature token onto the battlefield."

Born of the Gods

+1: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls.
-1: Draw a card. You may play an additional land this turn.
-5: You get an emblem with "At the beginning of your end step, put a 9/9 blue Kraken creature token onto the battlefield."

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.

Kiora’s first ability can target any permanent an opponent controls, not just one that can deal or be dealt damage.

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.

Once the first ability resolves, the damage prevention continues to apply even if that permanent changes controllers.

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.