Two bickering sisters give into a malicious doll entity in return for success and fortune, however failure to provide another victim leads to fatal consequences.

I can see your story, but all the other sacrifice movies start to muddy the waters. If ?failure to provide another victim? means a story about the two bickering sisters trying to off the other to get the lucky charm from a doll ? that's when it starts getting interesting.

Are the sister's the lead characters or is the person they have targeted as their next sacrifice.