Question not Theory
Like the Mangekyou Sharingan, you need both of your eyes to unlock Amaterasu or Tsukuyomi.
Maybe Rinnegan is the same, the sole purpose why Obito took the 1 Rinnegan is because he can summon the Gedo Mazo and control the Bijuu's more effectively to get the job done.
What do you think?
Like the Mangekyou Sharingan, you need both of your eyes to unlock Amaterasu or Tsukuyomi.
Maybe Rinnegan is the same, the sole purpose why Obito took the 1 Rinnegan is because he can summon the Gedo Mazo and control the Bijuu's more effectively to get the job done.
What do you think?
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