Yo Saber. Since you were wondering if you have the power to rouse my interest, well, I'm posting in your thread, so it's a good start. I have a couple (if I were to really sit down and think about it, probably actually a ton) of questions, if you'll indulge me.

First thing out of the way, how high fantasy is high fantasy for you? I get that you've got mages and gods and monsters, but high fantasy typically includes (arche)typical races like elves, dwarves and orcs. Will those be present here? So far you only mentioned, and put great emphasis on, humans, but what do I know? I'm personally not a fan of these Tolkienese (??) species as I've seen them one time too many, and while I may or may not be able to get over their presence if the package as a whole is compelling, it will have an impact on my interest in this.

I would like to know in general what some of your inspirations were for this, to help me to better position your setting.

Now your world is a very unexplored map for me, and I'm admittedly lost to some extent. There's a certain charm to that I admit, and I understand wanting to keep an IntChk brief, but you bring up plenty of names and expressions that have a lot of significance, while shedding very little light on them. As an example, the part about the Death Touched; they were former Immortals. That's cool and swell, but, what exactly is an Immortal? It's described in name only. I like the flavor of their description a lot, but I also don't really know where to place them or what to do with them.
I have a similar feeling of lacking a certain context with other parts of the information presented, like you were writing this post addressed at an audience perhaps already familiar with your setting to some extent, but you did say you were going to post a large amount of info in the OOC, so I'll just wait until then, I'm sure you'll cover all the holes.

Could you tell me perhaps a little more about technology in this world? For example, with trains around, are rifles/revolvers a thing? Have they already made traditional weaponry obsolete, if they exist? Just a general idea of what is possible in this world would be nice.

Since players are expected to be (amongst freelancers, I suppose) Mage Slayers, some more information on their ilk would also be appreciated. What their society is like, how they typically operate, and similar matters.

Lastly, and this is a more precise question, I have a rough concept in mind that I would be willing to try out, but I'll have to make sure it works within the setting. The idea I had was a character who is afflicted with some kind of long-term curse or disease, that manifests in some form of visible aesthetic on their body, most likely as a vile growth or deformation, and which is gradually spreading to infect more and more of their body. They might be looking for a cure, or some rare-to-find remedy that can temporarily abate the affliction's progress. Thing is, is such an affliction plausible? I would have to work together with you to work out a source for it that is appropriate to the setting, as it would have to be supernatural (and maybe unique?) in nature.

Thanks for bearing with me, Saber, hopefully I didn't ask too much ;P
I'll be looking forward to your reply! Thanks again.