Aurora considered his offer.  A lifetime was...long.  Being a tether for that long could make her a target for his enemies and it took away her ability to bargain with other entities like him, if he failed her.  A pensive and worried look filled her delicate features.  "I'd assume I can't willfully endanger myself either, at least not with the intention of getting myself killed."  She reasoned.  In reality, he only benefitted from this deal if she lived a long and healthy life.  If she died in a year due to some unforeseen danger, the tether would be severed and his ability to remain on this plane would become much more difficult.<br/><br/>"You have a deal..."  It didn't matter what happened to her.  Something had happened to Eleanor and he was the only one who could help her figure out who had taken her and how they could get her back.  Aurora could only hope that having a demon as an ally would prove useful and not detrimental.<br/><br/>"How do we make it official?  What happens after we find Eleanor?  You said you won't take more of my magic than you need, but do you just disappear after that?  Do I have to summon you those other two times?"  This was not exactly a common occurrence.  SHe had heard of other witches doing these sort of things, but so often it went bad.  They made poor deals out of desperation, but he seemed surprisingly straightforward with her.  There was no wiggle room for him to try and harm her or her coven.  And her soul was safe.  That was important.