"I take you with me on one conditions that you obey any command I might give you at once, without quesiton."

[Miss Melanie]

No: HPFGUIDX 133306

First I just want to say that I can't believe I am writing a pro-Snape post but I am.  I like him better now than I ever did before HPB :).  
 
I think that above quote which appears on page 550 of the American edition is basically the same agreement that Snape and Dumbledore had.  
 
It was discussed that a time may come when he would have to kill him, in order to save the lives of innocents or to keep an innocent from becomming a killer.  He was protecting a child's soul at this point.  
 
He couldn't ask anyone else to do it he needed someone who had it in them to kill.  The only person who I can safely say is a killer would possibly Snape and that is why Dumledore needed him and asked him to do this.
 
And before you guys go and call me crazy remember he had already asked for Snape prior to this event.  
 
~Melanie
 

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