Willow/Tara Fanfiction

[katsukic.livejournal.com]

Hi I'm looking for a fic that takes place in the 6th season. In it Willow finds some kind of spell that allows her to take control of anything inside a certain area. She uses it to stop some demons by making them stab themselves or something like that. She eventually decides she should use the spell on all of Sunnydale and get rid of all the demons. She also begins putting several memory spells on Tara and I believe at some point the crystal breaks and it hurts Tara. Thanks for any help you can give.