Bloodbending is restricted because It's op, if everyone had it, What fun would bending be?
Bloodbending can't hurt you, unless you take fall damage or something.
However they can probably keep you in the air for a long time.
Bloodbending however you can get on my server if you win WaterChief. We have Elemental Leaders. That lead the elements and stuff.
Then there is donating for it.
But think of it. if everyone had bloodbending? O _O YOU CRAZY?!!
Well.... Sorry. but Yeah. That's like the only move that my server restricts too. and it's not even fully restricted. WaterChief has it.
And if you win WaterChief, you get bloodbending
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OKAY way off topic z.z