I think the replies here are too bogged down in specific features of the OP's character and miss the real issue: why should *ANY* character slaughter the druid's grove?
To motivate a NE player, there needs to be a promise of power, or the narrative doesn't make much sense ("Greatness, at any cost"). The Hag/Raphael both promise something for the supposed "evil" choice. And that's ok, because an evil character doesn't intend on paying anyway. They expect to take advantage of the situation and get the boon for free (I seriously hope there is a way to outwit Raphael, or pay with someone else's soul, perhaps the Teifling telescope girl?). Alternatively, if going with a LE path, the drow/goblin's should have some legal right over the lives of the druids. There's a ton of ways that could go.
