Morse code

The Morse Code (モールス信号), is an ancient means of communication, which Eta managed to create,as the first means of secure long-distance communication, taught by his teacher, Cid Kagenou/Shadow. Said communication, serve to be able to communicate, with the members of Shadow Garden, of other parts of other kingdoms, in a practically safe, and undetectable way, for the leaders and members of the Cult of Diabolos.