Non-traditional Reiki symbol. This symbol has been added to the system of Reiki by some Reiki teachers, including Arthur Robertson, and is used in Usui/Tibetan Reiki as a meditation technique. The antakharana is a two dimensional cube with three sevens on its face. Myth has it that this symbol comes from Tibet and China. It is claimed that if you meditate on the antakharana you will connect the physical brain with the Higher Self.