Tenzin, Korra and others in “Unfinished Business”

Tenzin

Were you able to stop Unalaq and Vaatu?

Korra

No. They fused, then Vaatu ripped Raava right out of me and destroyed her. Vaatu won.

Bolin

[scared] No. I am too young to live through ten thousand years of darkness! Korra, can't you talk to one of your past lives or something?!

Korra

When Vaatu destroyed Raava, he destroyed my connection to the past Avatars too.

Tenzin

If that's true, then -

Korra

The cycle is over. I'm the last Avatar. [Tears up] I'm so sorry, Tenzin. [She starts crying]

Kya

[To Tenzin] She needs you now, more than ever.