Reaper's Ultimate Enhancement

Zanpakuto, live with the god of death, die with the god of death.
Each knife has a magical power, or it can be transformed into thousands of blades, or it can control the high temperature and flames, or it can release extremely deep cold.
What I have, who has traveled through this point, is a wonderful Zanpakutō that strengthens those who have been slashed.
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"My principle of strengthening people is, fuck your X's strengthening explosion! Asahi can be strengthened into a swastika, and the red cannon can be strengthened into a nuclear bomb. Old man Yamamoto came to ask me why there are more than 3000 gods of death in Seireitei who can swastika. You Any idea?"
How would I know X's!

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Key words of the novel: No pop-up window for the ultimate enhancement of the god of death, the ultimate enhancement of the god of death