It's tough finding Satanic SF stories, let alone a good one. Maybe the tales featured in our Theological SF issue will ease your cravings. Have a snort and see how you feel, 'trooper.
Tevun-Krus #28: Theological SF
https://www.wattpad.com/story/70298262-tevun-krus-28-theological-sf
Satanitech Part II by MadMikeMarsbergen
Sequel to the story that leads this very issue, SATANITECH PART II expands the mythos while leaving things open for a potential third story.
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Tevun-Krus #66 - Satanic SF
Science FictionWelcome to issue #66(6), Satanic SF. It's like Theological SF, but specifically about satanism.