http://naruto.wikia.com/wiki/Strengthen ... _Injection
i Realize this is a supposed clan technique from the land of demons, but there are only 10 non slug related healing techniques in all of naruto and 2 of which are village exclusives and 1 is video game only.
Also the clan page only links to one specific guy who's clan power is to access another dimension; not making snake based chakra transfer jutsu's, so i think this should be a two stage ijutsu tech rather than a clan tech for a inaccessible village that physically doesn't exist on the map. Also again he states his clan power is accessing another dimension with a super natural entity in it, not this particular technique as its simply a hiden.
Stage one allowing for the transfer of a single element for the duration of the technique along with access to the transferred individual's chakra with a A rank cost and a B rank upkeep, and the second stage being an S rank costing amp that transfers 75 sp and grants the target an A rank upkeep cost stat boost to strength constitution and reflex's granting a tier in each. No jump starting in this one. gotta go from tier one to tier two. Also the person tier 1 is used on gets to decide when tier two is activated and the user of the technique simply has to eat the cost. If they don't have the SP the technique fails.
At least that is what i propose.