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Lapis Dra’al : Aspectum Tridentum the 3th Key
I have posted a short working with Lord Sagmon.
It isnt a must to implement these keys what important is, is the name of the being and the sigil and you are good to go.
I am just writing it would be best if you impliment them before you start directly working with a Dra’al Devil.
Like clapping your hands or using bells before in the middle and the end is acceptable and you should do it that way.