Blood Moon by Ctreuse109 on DeviantArt (original) (raw)

Blood-bending all started with Hama during the 100 year war.

she learned it, used it to escape the Fire Nation, only to pass it onto Katara.

so in chronological order, it should be Tama first, then Katara, then Yukone,

and then his sons; Tarlok & Amon.