#9 - July 19, 2016, 9:04 p.m.
As Parinke said, Shadow Mend.
This is intended after the class changes that came with the pre-patch. From a fantasy perspective: "Finally, having turned away from the Light, Shadow Priests eschew such spells as Heal, Flash Heal, and Prayer of Mending. Power Word: Shield and Shadow Mend are their primary healing tools."
Generally, this means that healing for any non-healer spec'd class is intended to be weaker now in comparison to if you were spec'd into, say, Holy.
You can read more about the goals with our Priest changes
here.
Side note: I'm having a lot of fun with Shadow now. :)