Jennifer possessed the ability to cast illusions in the minds of those she intended to sacrifice, which she typically used in order to terrify her victims, thus making them easier to kill. Just as Jennifer said to Derek, Kali also confirmed that she left Jennifer to die "peacefully" rather than giving her the killing blow. The first rituals were at least two mass sacrifices that involved compelling hundreds of crows to commit suicide to increase her power and allow her to use a form of glamour magic to make her appearance that of an unscarred, beautiful woman to match her new identity, Jennifer Blake.
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She began to panic when he started to slip through his arms, and despite her attempts to wake him, she accidentally dropped him on the floor. In Chaos Rising , Jennifer, as the Darach , showed up at the party held at Heather 's house, where she captured Heather while the young girl waited for Stiles Stilinski to return with condoms so the two could have sex, though neither her Darach form nor her glamoured Jennifer form were seen. On the way there, Jennifer, feeling the need to explain herself, insisted that he needed to know that she wasn't doing this because she had to-- it was because she wanted to.