What was Madara's Trump Card?

[123fire]

When madara talked about a trump card long ago in the manga, was the trump card revealed or what? If yes what was it?

 

[ObitoRolent]

Prolly black zetsu and his reanimation?

 

[RaitonOniKairRasengan]

Taking control over obito and reviving himself...

 

[Senpou]

I mean, really?

 

[Maly]

Nothing ?

 

[A$AP Wap]

Turning into Kaguya.[SUB]

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[/SUB]​

 

[Sound]

Black Zetsu hidden in the earth

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