"You four will be more than human from this point on... You four shall be... Fantastic."

After a warning/vision from Avatar Aang in her dreams, Korra prepares for the arrival of a cosmic being who intends to destroy the world. But what can she possibly do against such omnipotent power? How can she battle a foe that she's powerless against? Can she convince him to spare her world and everything she holds dear to her heart? R & R please.