Dumo (Tibetan Dai Ko Myo)
Dumo (Tibetan Dai Ko Myo) is also a Master Symbol that you can use in attunements to open the main energy channel, Sushumna.

It’s one of the symbols that help remove energetic blockages more directly. It can assist Cho Ku Rei for a more efficient outcome when used with this aim.
The Dumo Reiki symbol works great in aligning the energy print of the primary chakras while cleansing them of residual elements.
With the rest of the Reiki symbols, Dumo can re-program and cleanse crystals, making them efficient tools in therapy and meditations.