I'd love to see it if Korra can learn lightning generation or if by some genetic fluke it is only limited to Sozin's bloodline. I'd also like to know if Korra knows how to heal, plantbend, and bloodbend. I imagine that Katara would let that last technique die though.
How would bllodbending bee different?
Plantbending would make sense, but bloodbending...
Why not spermbending? Then.