There are accounts in popular books concerning extremely powerful energies encountered when evoking a Demon. To my knowledge, no one using the methods outlined on this website has ever experienced anything negative or overwhelming. I have invoked Demons many times [see Invocation & Evocation] and the energy was never beyond anything I couldn’t handle or in any way uncomfortable.
Formal Methods:
Copy, print out or draw the sigil of the Demon you wish to summon on clean paper. It is important that you be left alone and not disturbed in any way. Close your eyes and visualize the sigil in your mind as best you can. It is ok to open them and look at the sigil again [as many times as needed] to get a clearer image. While visualizing, recite, or chant the name of the Demon repeatedly either in your mind or aloud.
Recite the following prayer:
Lord Satan, by your grace, grant me, I pray thee the power to conceive in my mind and to execute that which I desire to do, the end which I would attain by thy help, O Mighty Satan, the one True God who livest and reignest forever and ever. I entreat thee to inspire [name of Demon] to manifest before me that he/she may give me true and faithful answer, so that I may accomplish my desired end, provided that it is proper to his/her office. This I respectfully and humbly ask in Your Name, Lord Satan, may you deem me worthy, Father.