:| You don't know much about Kakuzu, do you?
Zexion, that was his original heart that Kakashi pierced, we both know this, correct? If it wasn't, and let's say it was a stolen Heart with the blood of another shinobi in it, Hidan's ritual would not have effected Kakuzu in the slightest. Kakashi had to pierce the original heart. OR, OR, all the hearts now have the same blood in them, Kakuzu's as it flows about to keep them alive. Either is an answer.
We see Kakuzu's blood twice and mentioned once.
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,
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, and
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. All of these leads up to the fact that Kakuzu STILL has blood, and that was his original heart (Or each heart is filled with his blood,). With Kakuzu officially having a heart, having blood, how is he not drowning in the Water Dome? How does he keep his hearts alive? With what, his chakra lmao?
Lel @ Liquid Thread. The DB states that Hidan's jutsu works with blood, nothing else. [
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].