Originally Posted by
knife eater
The considerations get more interesting... if not the jyubi then where did the sage receive his divine gifts and which gods (with an s) bestowed upon him favors? Shiki fuujin could be a matter of everyone else but so6p having to pay a higher price not having mastery of the related path or domain. Nothing about the technique needs be watered down especially if rinnegan elevates subject to object and "rule'. Either way, dealing with gods and figures that control much of a domain, realm, dimension or what have you would certainly be up the sage's alley if his work was to tie him to all things and subdue the 10 tails, the origin of all known concrete and most abstract substance.
It still makes,minato a bad ass since the dead demon appeared and honored the price paid from a shinobi who didn't have indication of sagely prominence aside from knowing how to summon him. You can imagine what some of these extra-wordly supreme beings can be when cranky, just look at manda the super snake when pouting and stubbornly refusing to cooperate and obey his contract without further coercion!
Much respect to minato and sarutobi for successfully closing the deal in their unwavering call of dead demon seal.
Further considerations flesh out indications of preceding bloodlines, uzumaki before senju or if it's the other way around. The sheer power and utility of the summoning techniques is a sign that they were practiced before the influence of the 10 tails if the sage's era and would be crucial to the sage's negotiations of power and bargaining with whatever divine or demonic. The uzumaki could be as ancient to have originated to the precursors to even the sage himself where the sage was a marker of a "halfway point" and was instrumental in crafting the conditional yet pivotal roles of senju and uchiha to have both ego and reliance in harmony to achieve a greater power than any one person and the speculative union of hyuga and uzumaki was the toolbox for such a craft, worked into his offspring and spread about the minor bloodlines discovered by kabuto.
I wonder if shiki fuujin could work on madara if the rinnegan is a mark of supremecy no matter if the caster sacrifices his or her life. Did the sage install a failsafe that supremecy is recognized only when the relationship between uchiha and senju succeeds beyond just weilding a swindled rinnegan? My guess is that knowing the names of the bijuu and the willing gift of their combined power makes the person the God and techniques like shiki fuujin become the efforts of your underling demons and henchmen and the price is they are allowed to do your bidding as your subject and not take your life as a lesser yet tenacious shinobi. Naruto will be a total badass. Every clone spamming shiki fuujin against madara's amassed army of dark wood clones and final form zetsu Hydra wood dragon fusions.