I'm guessing... the two put the lid on the Demon Core and it started fissioning hard.

The only way that could have happened is if Nagato slammed the two pieces together.

Steak said:

The only way that could have happened is if Nagato slammed the two pieces together.

Which she could do.

Well, not Nagato's first nuke

Now they're all sons and/or daughters of bitches.

Could be added to the pool Told you not to do that
Due to the fact that in post #4295746 they are seen apparently messing with it, which you should not do.

>Elohim

Well, she definitely summoned Trinity