Making Of: On Which I Stake My Name
For real, tho, if anyone is wondering: if I hadn’t been able to come up with the archetype-bond idea, Loki would still know all of Johnny Con-job’s dirty laundry.
Because as soon as it became clear to him he’d be dependent on this guy he would’ve set up a super-basic summoning circle the first time Connie left him alone and whispered into it: “I, Loki of Jotunheim have an offer for the First of the Fallen: you love John Constantine’s misery. I would like to have means to cause it as beautifully as you know I am capable of wreaking, should he betray me, as you know he is also good at. If you give me all the ammunition that you can against him, I will use it as I see fit.” to cover any information and horrible secrets he missed that might be in John’s darker half in Hell, that might come back and bite them both later.
And the Devil would’ve appeared and said, “I believe that to be an offer too succulent to refuse.” And John probably’d figure it out at some point and be deeply uncomfortable, but also knows he’d have done the same thing (because, he already has, a couple times, sort of, to the same Devil) and furthermore it’s basically trolling the Devil if he manages to keep on Loki’s good side enough the god doesn’t actually want to use the full extent of that ammunition.