Kiora, the Crashing Wave — ruling 1

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

Kiora, the Crashing Wave — ruling 2

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

Kiora, the Crashing Wave — ruling 3

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.

Kiora, the Crashing Wave — ruling 4

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.

Kiora, the Crashing Wave — ruling 5

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, the Crashing Wave : règles, fonctionnement et interactions (MTG)

Kiora, the Crashing Wave is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

+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."

How it works : Kiora, the Crashing Wave

Original English text — Wizards of the Coast / Scryfall

#1February 1, 2014· Wizards of the Coast
Kiora’s first ability can target any permanent an opponent controls, not just one that can deal or be dealt damage.
No other card is named in this ruling.
#2February 1, 2014· Wizards of the Coast
Once the first ability resolves, the damage prevention continues to apply even if that permanent changes controllers.
No other card is named in this ruling.
#3February 1, 2014· Wizards of the Coast
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.
No other card is named in this ruling.
#4February 1, 2014· Wizards of the Coast
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.
No other card is named in this ruling.
#5February 1, 2014· Wizards of the Coast
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.
No other card is named in this ruling.