FBI Email nigerian bank?

So i got this email claiming that i have $10.5 million, being withheld cuz its prolly terrorist money, now im thinkin scam as im reading it, but as i get to the bottom i realize they not once mentioned me sending them money or anything, they are just saying i need to contact them in 3 days with some kind of Diplomatic immunity of international transaction permit.now its obvious that its fake, but why would they send this bogus email if they arnt asking for money? any ideas?