What he said ^
Uzumakis have large chakra reserves, hence they were suited more to Rinnegan, and well, BZ is weak, very weak, fodderlike, compared to Nagato.

Black zetsu lacks suitable amount of chakra
Nagato as a uzumaki had a vast amount of chakra thats why Madara implanted his rinnegan into him.
But he still trolled Minato the fastest man who ever exist, imo.
Sorry but, who cares about chakra? Madara forzed Obito to revive him, and he is not an Uzumaki. He could easily have ordered Black Zetsu to sacrifice for him. It's a part of Madara, after all.
yeah this is just plot no jutsu xDFFs, he could even have ordered a zetsu connected to the gedo mazo to revive him. I'm sure not a single Uzumaki has more chakra than Gedo Mazo XD.
But he still trolled Minato the fastest man who ever exist, imo.
FFs, he could even have ordered a zetsu connected to the gedo mazo to revive him. I'm sure not a single Uzumaki has more chakra than Gedo Mazo XD.