I'm not sure which, but I'm pretty sure he's a 40 rare pull in a future edo treasure like how Nagato is a 210 super rare pull (I think). So I wouldn't buy him if I were you. You can do a lot more with the needed coupons/ingots than buy a single ninja that will be free at some point.

Meh, I did say 'I think'. Point is, never buy ninja or anything new when it first shows up. You'll get it far cheaper or for free in the future.