The Investigators of Down Cthulhu
Stone's of Dream Talk
2 small green stones
A raggedy piece of parchment comes with it: A phonetic translation of a sacred ritual with which we can communicate with him and vice versa. Say it over and over while concentrating on a simple message you then repeat over and over in your mind.
The next time the person on the other end sleeps, will have a vivid dream of the message
Distance can even reach Mars, at least.
One is at NYC office, the other in Etienne’s safe in New Orleans