That is a truly fantastic effect. Very much gives indications that the sanguinary stuff which the nocturnal hunter so hungers for might not exactly agree with her entirely -- though, even as it seems her diet sears her own supernatural flesh, and looks to give her a condition akin to blood poisoning as it entwines with her own circulatory system, her expression does not hint at the slightest compunction to feast upon the luciferian liquor again, again, and again.