Talk:Bloodbending/@comment-94.67.100.247-20120605163103/@comment-67.169.129.64-20120606015556

if someone recorded, perhaps Sokka or Zuko, the journey of the Avatar, they might have included Katara learning blood bending in there. If said book existed, someone, a.k.a. Tarrlock could have read it and practiced the art himself.