it is a little disturbing what comes up in ShadowEagles pockets. I enjoyed reading the story, and the portrayal of occult creatures s being slightly more neutral, or if not neutral, more devious than most are portrayed.
A fairly old idea and I've seen several variations on the theme (mostly in the form of coins or dice), but it is a good one.
I rate this as one of the better versions, mainly for the intriguing back-story which becomes a kind of legend of the coin's creation.
The legend of the Caves of Derri'que could well be the basis of a plot:
iAn unstoppable monster/dragon/demon/whatever is devouring the local population and/or demanding human sacrifices. The creature cannot be harmed by normal weapons, the king's armies an do no more than irritate it, and even the royal sorcerers can find method of defeating it. Only the Hound of Derri'que (if such a thing truly exists) offers any hope of salvation./i
A solid 3 because it's not particularly original, but upgraded to 4 for the solid back-story.