It is supposed to be a routine bit of housecleaning. There's a den of undead to the south of a small village in Nex, and as good stewards of the entire inner sea region, she and Shawil are spending a few minutes in the evening laying a few dozen undead to rest. It's not worth taking Elie or Catherine off of their work, and wouldn't be worth her time apart from the thing where she honestly kind of misses occasionally using her phenomenal cosmic powers for combat instead of something more economically useful. She doesn't have the full stack of buffs they use for huge fights, but she has her big ones - nine lives, mind blank, moment of prescience, and invisibility. It shouldn't be possible to hit her with almost any sort of magical attack without stripping her protections first.
Something does, though, apparently, because she feels herself hitting Shawil with two banshee wails in three seconds. She is pretty sure that she wasn't supposed to do that.
She has never actually been dominated before. It takes her a second to realize what's probably happening. Only one second, though, which she figures is good, because the more seconds this goes on the more likely she is to lose control of what she's allowed to think, too. Maybe she already has. Only one way to know for sure.
Someone just landed a dominate, she tells Elie, over the telepathic bond. I think I just killed Shawil.