Board Thread:Spoilers!/@comment-25926288-20160713182420/@comment-24674051-20160720134512

Admittedly it is Dark Regina. but it is that dark part of Regina that pursued and harrasseed Snow all those years, KIlled her father, and cast the Dark Curse. If you watch "The Thing you love most", you can see that the Regina that Killed her father was also struggling between her Dark Implulses, but was not strong enough to overcome them.

I picture the EQ post serum as Regina without any of her better qualities, such as forgiveness and tolerence. this EQ has nothing to hold her back, and would just love to defeat all her old enemies (which would include Snow AND Emma).