Also, general question: https://rpg.stackexchange.com/questions/78681/how-to-introduce-the-levelless-cost-based-spells-of-cthulhu-d20-into-dd-5e recently came up with a bounty. I'm tempted to try to answer it again, now that I have a d20 CoC book and a better understanding of the question.
Is this a case where I edit the original, delete the original and add a new answer, or add a new answer and leave the old one up?