After experimenting, Dark confirmed that the "Greed I" card was usable, and that the magic crest transformed from the "Altar Spell" could indeed be applied to the creation of "Greed" Great Sin cards.
This gave him the confidence to continue his research.
However, "Greed I" had very low requirements for magic crests, and the boost provided by adding one was insufficient to let it cross a rank.
The greatest use of refining "Greed I" was to observe the magic crest's reactions during the refinement process through experimentation, allowing him to adjust and optimize its details.
Dark already had ample experience in this regard, and he soon adjusted it to a level sufficient to support "Greed II."
The next morning, he immediately began his second experiment. As expected, he succeeded on the first try and refined a "Greed II."
But from "Greed II" onward, things were no longer so simple.
The refinement experiment for "Greed II" required consuming ten points of "Greed" at once. For Dark, whose Great Sin resources were far from abundant, this was not something he could attempt lightly.
Continuing to use "Greed" refinement experiments to adjust and optimize the magic crest was the more sensible choice.
Correspondingly, research into the "Pride Magic Crest" also had to be restored to his daily routine.
Combining the two and researching them in parallel, then finally attempting one "Great Sin IV" refinement experiment for each—that was what Dark planned to do next.
However, obsessively studying a single project made it difficult to achieve results. After researching until noon, Dark temporarily set it aside and turned to continue studying the [Holy Armament Spell] that afternoon.
The refinement of the "Holy Armament Spell" had actually entered its final stage. Within a few days, it should be successfully refined.
Dark was in no hurry.