Originally Posted by
Zero
Well, a resangan is for killing people, F:RS is for killing monsters, so the Bijuu Bomb (perhaps it's "That Jutsu") would be a technique against semi-gods, or halve immortals, normally, you don't have people like that around even in Naruto world (it's thanks to Kabuto that there are more of them now, so Tobi was at that time, more or less the only one), so a jutsu of that power would useless, when you can still kill everyone with a lesser one (not counting those above monster level).
