You could say they're into magical science. Alchemy is one of the studies they try to master.

[Idly, her foot moves up, until it's brushing against his neck, up his cheek, and down again. Anything? She loved it when people gave her such licence.

She laughed quietly. Creepily even.]

Anything? I need examples. Limits. You know anything is a deadly word to say to a woman like me.