Who actually came up with idea for the perpetual sacrifice seal, though?

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Who actually came up with idea for the perpetual sacrifice seal, though?
I drew Alison eating her sandwich and Bendy freaking out when she was dangle 10,000 ft in the air!
Last drawing is Alison next to a plane. (Reference is right next to it)
I really enjoyed reading chapter 346, glad we got some fun interactions and action.
"Suigetsu . . . You are My First."
I'm just now realizing that while I don't dislike Naruto/Sasuke per se, it does very little for me. Meanwhile I go feral shipping Sasuke with every single other dude he interacts with.
Kagome 100% ready to throw down on InuYasha’s behalf.
Cale : ...the owner of my ancient power told me everything
Bud : huh?
Bud : why would an ancient power talk?
Cale : don't they usually talk to you?
Bud : huh?
Cale : huh?
Bud :
Feel free to use this confuse bud