Also known as IM, is like a demigod use of contacting each other. The goddess, Iris, transports messages from every demigod, creature, or god. It's like a mist. You see the person you want to talk to through a mist cloud, then just talk. But you have to give a gold drachma if you want to IM. Also, if Iris isn't busy, she lets the IM message between demigods pull though. Just think of it as a face chat on computers.