The title says it all.
Leviathan is Saturnian spirit of the Infernal Empire, is the Mother of Creation/Chaos, she is the Beginning and eventually the end
Azazel is Saturnian spirit of the Watchers the Bringer of Iluminatio and Black Flame
Furcas is the Saturnian spirit of Goetia and so gatekeeper and teacher of Magick
Leviathan is huge part in my craft alongside azazel,lucifer,satan and iblis. I invoke him as the serpentine lord of the west and during my rituals I call in his essence for self transmutation