If you're anything like me, or most "Call of Cthulhu" or RPG fans for that matter, you've seen almost every runic and occult font out there. One of the problems with creating props for an audience like that is that they immediately recognize the various flavors of Tengwar or Futhark. You're constantly looking for new typefaces for scrolls and maps to keep things fresh.
"Levitated Rune" could be just the thing. It's the work of Jared Tarbell, who was kind enough to make it publicly available at his website.