... You mean this? This is from the first prey that Nagato caught.

The poison it's pumping out is dangerous, so the dinosaurs can live here without no one from the outside world finding out about them.

So you went completely primitive, eh!? And those accessories, too!

Murakumo was dying, so Nagato let her eat it...

Nagato cannot afford to die in a place far away from where she was born.

But to kill birds to save dinosaurs... Nagato doesn't know which is right and wrong anymore, no matter how hard she tries to think...

Thanks to it, most humans don't approach this place.

So until when Nagato can understand that, Nagato will keep this so that she won't forget.

You guys saw the volcano in the middle of the island!?

Yes! So Shimakaze and Nagato will protect this island!