Curiosity, mostly. And a foolish belief that if I was bold enough, the consequences couldn't possibly catch up with me. [She's not so worried about keeping her past secret, though. So here comes the Helen lore again.]

It was an experimental serum that myself and four colleagues decided to test on ourselves. That was... [She glances up, doing some mental calculations] close to 200 years ago at this point. Which is not quite as impressive a feat now that I've met my share of elves and the like, but was unheard of on that side of the Veil.