[Soren happens to run into Caster while he has his tools at the ready, having been drawn to the other man particularly because not only is he from the mirrors like him, but their conversation at the Parliament meeting two moons or so ago had been so salient. After greeting him, Soren asks about his tools, and when Caster explains to him in detail about the protective runes and what he offers, it aligns with what he understands of the witch — he seems to be devoting significant focus on runes and scripts. Afterwards, he weighs the offer and decides the extra failsafe against control might be worth it. He is a dragon, after all, and if the cloak and hood come off or someone with a keen enough eye appraises him, he might find himself a slave to someone's compulsion spell like he had in the dream — but more vulnerable with powers yet undeveloped in the waking world. He can't be too careful here.]

...Very well, then. So long as the price isn't too steep for me, consider me indebted to you. [He spares a couple more seconds for another thought.] I think I would prefer the rune be placed somewhere hidden, if you don't mind.