Commune is an ability that all druids have. It was researched and developed by Tse Gaiyan as a way of letting their Udemi relay messages back to either their base or their partner Utasa in town. The precision of it is limited, as it has to go through the gaea. Although the Utasa do not know druidry, Tse Gaiyan has created objects that will let them hear the messages.
Becuase the gaea is very different from human consciousness, the messages related through commune are not generally the way humans would prefer to communicate. It is done through images, and as such, a new druid must be assigned an animal image to use as their callsign. This can be done through GM help, and a druid should use request to see if a GM is available to help them.