The Best of Intentions (1987)

Back of the Book:

Prime Plane immortals are dying like flies: nasty, violent deaths. The Hierachs suspect Entrophy, as usual, especially with all the rumors of demo's involvement. To top it all off, one of the Hierachs is missing - Mazikeen.
Your Mission as novice Temporals, should you choose to accept it, is to find Mazikeen, uncover his kidnapper, and bring him or her to a court of immortal justice. This entails more than a mere detective job - it also means taking part in the Immortal Olympics and going plane-hopping with the best (or worst?) of them.

Adventure fot 4-6 Immortal-level Characters