Originally posted by Vinegaroon:

Nah man he needs to build a giant fortress to defend against the boar and neck raids, scary stuff they are

And after she kills the lightning deer, what raids will have she to defend against? Boars and necks? The answer should give a reason to postpone the killing until it becomes a true necessity (to get the power, I guess).
Moreover, boars and necks have never been a nuisance to ward oneself from. On the opposite, they are a blessing, a day without hunting.