Big 'NO!': Unavaatu has one after Raava is reawakened.

Big Damn Heroes: Desna and Eska save Bolin and help protect Korra's body, while Jinora's spirit saves Korra from being destroyed by Vaatu and Unalaq and helps her locate Raava within him.

Korra wins easily, but that's only the opening volley.

Beam-O-War: Korra and Vaatu have a contest between their Chest Blaster.

Sure enough Korra is able to use her own spirit energy, in conjunction to the cosmic energy gained from the Tree of Time, to take down UnaVaatu. She is Korra and she is the one who can save the world.

Be Yourself: Much as he had to learn last episode Tenzin tells Korra that she in no more defined by Raava and the Avatar Spirit then he was with his father.

Attack of the 50-Foot Whatever: Korra is able to separate her spirit from her body and turn giant like Vaatu/Unalaq.

Which actually explains Jinora's power somewhat. Also, Korra using soulbending to take on UnaVaatu is established to be due to being in the Tree of Time during Harmonic Convergence, giving her spiritual power a major boost. While the previous episodes did establish the fact Jinora has an unusual affinity with the Spirit World, the way she uses her 'spirit powers' to help Korra to defeat Vaatu still comes almost completely out of the blue. Was released a week early at midnight, the same day as the previous two episodes were aired. Jinora returns to life, and Korra announces the beginning of a new spiritual age for humans and spirits.

Eska and Bolin break up, and the twins return to the North Pole with their troops.

Legend of korra season 2 episode 14