Celenia D10 System CD10: Spell: Telepathy

The ability to transmit and receive thoughts from a willing target is called telepathy. With this ability you can speak with a person with thought alone. The receiving target does not need to be telepathic, as you establish the link, but the target has to be aware and willing in order for you to read its thoughts and have a two-way conversation. Establishing a connection requires no skill check. You simply pay the PSI cost and the telepathy link is established.   If the target is unwilling, you can still transmit messages to the target, but you will not be able to get a response. Your capability with telepathy is reliant on your power as a psion. Depending on the value of the Psion trait, you have different capabilities.  

1. You must maintain eye contact with the target in order to send any thoughts.
2. You must be able to see the target in order to carry on the conversation. If the target leaves your line of sight, the contact is broken.
3. You must be able to see the target in order to establish contact, but once its established, you can carry on a conversation even if the target leaves your line of sight. Should you break the contact for more than a minute, you must again establish line of sight in order to re-connect to their mind.
4. You may establish contact with any target that is within range (~500 meter radius around you). You must be familiar with the mind (know the person or have spoken to them) to find them without seeing them.
5. You may contact anyone, at any place, at any time. You must only know their mind and know where they are.
6. You can find anyone you know and can contact them for any period of time, wherever they are, as long as they are not shielded.

For powerful psions, there's a method known as "pinging", where the psion continually sends small messages, akin to "Marco-Polo", to the target in order to maintain their location and connection.