This is a great little sandbox. My largest criticism is that I wish there was more of it. What you've provided in just three pages is a very rich gameplay space that excites me to run it.
The layout is obviously pretty basic, but the black background is a stylish choice. It makes it easier for me to read than if you were to have placed the same text on a white background. For some reason (maybe the font choice), the white text on the black background evokes the right mood all on its own. If you want to develop your layout skills, I would experiment with adding more visual elements and trying to fold them into the same cohesive mood. I've been using a bunch of assets from the Met while working on mine—you might be able to find some good visual assets there that suit this premise well. You can find their open access collection (all public domain!) here: https://www.metmuseum.org/hubs/open-accessYou do a great job conveying the coolness of wizards. I don't think you necessarily need it for this mission, as what you've included is already very good, but I think it might be enhanced by more attention to its narrative fabric. A little "victory lap," so to speak, to fill out the extra space you've got left over. It would only make this mission cooler. More thematic intrigue, more questions, more of whatever you love about this mission.
I really like the non-standard setup, by the way. Not so much of a "FIST, come help!" kind of mission as it is a "hey there's treasure" kind of mission. I find that kind of thing engaging.