Inorder to prove my theory that Sasuke is Immortal ,he need to die.Itachi refer to Madara as an immortal because he have Eternal Mangekou sharingan(ems).EMS allow the user to not go blind stated by manga,which mean if Madara get stab use izanagi and revive himself.Similarly Sasuke can use izanagi to if he near death and survive.
The scan above said that EMS is permanent and inextinguishable light.Zetsu said Amaterasu is inextinguishable because it cannot be put out normally ,it will continue to burn in all circumstances unless the user remove the flame.On the left hand side we still see the amaterasu flame still buring from Naruto and Sasuke combo(below) against obito
Sasuke know fully how izanagi work from Danzo and Itachi,i sure it a preparation for something that Sasuke have use the skill in future.Sasuke is technically immortal until kishi show us otherwise.
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The scan above said that EMS is permanent and inextinguishable light.Zetsu said Amaterasu is inextinguishable because it cannot be put out normally ,it will continue to burn in all circumstances unless the user remove the flame.On the left hand side we still see the amaterasu flame still buring from Naruto and Sasuke combo(below) against obito
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