SPOILER!! where did the spiral zetsu come from?

[Hokage Minato]

ok so the last time i really remeber seeing the spiral zetsu was during flashback of obito, so maybe somone can tell me when he appeard fighting at the battlefeild and when did he use the wood jutsu??? this realla bugged me so if anyone knows pls let me know? and oro is gonna help sasuke survive and start helping in the war i think!

 

[GOD2U]

When a man and a woman love each other.... oh sorry you didn't mean it like that.

 

[brownbear]

I was also confused,but at this point I just accept when random shit goes down in kishis manga.

 

[AllseeingSharingan]

He obviously arrived when madara was sealing the bijuu.

 

[Hokage Minato]

i thought maybe i missed something, it woulda just been nice to see him appear and to use that big 1000 wooden hand jutsu, hes probly there to just hold them off so they dont go join the others, but now seeing naruto and learning about sasuke i think they all are going to destroy spiral Z and go for madara......

 

[Bronze]

He was hiding in the shadows waiting for an order.

 

[Zol]

We didn't see him arrive. It is implied that he has been fighting there for a while already.