Maki Casanova said
I have a suggestion regarding the relic's power source and how it actually chooses its wearer.Everyone has a little bit of magical energy inside of them, but those levels frequently aren't enough to rationally sustain relics; users of the artifacts usually have a stronger, more abundant supply than most people, above average let's say. As for how it chooses its wearer, there must be (a) certain condition(s) to be met. For example, Kaiden's bell relic requires the user to be blind. That makes sense, right? But then we have Shin, and let's say that the Mask's conditions were that someone who wears it must be used to following orders without question, but has a potential for making individual thoughts and ambitions outside the instructions (I know this wording is a bit weird, sorry)!
That sounds rather plausible to me, though you'd have to add that the relic's powers adapt to how the evoker is. For example, if Marcus no longer focuses on surviving, but would return to Da-Hyun to claim his father's old position as a noble, his relic could (for example) provide him with the power to manipulate thoughts or to erase all memories concerning Marcus' past or simply be loved and noticed by all who meet him, idk. This already given fact would mean that the relics poses a conscious of their own to a certain extent.
Also, if I'm remembering and summarising this right, The Vocators can work the wat they do, because their members are mentally molded into a certain way, to make sure they react positively to the mask.
Thus, basicially rewording Maki's statement, the relics react to persons if they meet a few conditions, they have to have a certain state of mind/ personality/ potential, as well as a larger than average "pool of magic", this pool is heriditarial to a certain extent, which is why the theory of "The blood of the old Kingdom" has come into existence. But every relic reacts differently and slightly adapt its powers to its user.
A myth (sorry, I can't help it) could be that the relics weren't ever actually crafted, they came into being somehow, have a mind of their own and try to achieve certain things through the evoker to their choosing. That's why they only choose people with a certain type of character, to make sure they can achieve whatever goal the relic has in mind.
I'd suggest that rarely onyone knows/beliefs the theory of the "pools of magic".
Edit: It sounds to me like Maki's "pools" and Sep's "blood markers" could be combined. After all, not all relics are combat oriented. The best cooks in most courts would for example be relic users with powers concerning taste or creativity. Could all of you agree on the solely Combat oriented relics being "marked in blood", and thus only circulate in a really small circle of people, [though the relic powers could have adapted over time to be slightly different. For example, a non-locked relic could gain combative powers over the course of a 1000 years, though the most powerful combat oriented relics would be those who were intended to be so and thus blood-locked]
I do hope that I explained it properly :'D