Anyway, what kind of artifact are we talking here? It seems to me like it'd have to be something like city-sized to go and nearly extinguish a sun. Which would be pretty fun - imagine being inside a sun-killing god-machine as it fires up and flares with ancient unstable magic.
I was thinking it would be some kind of large crystalline structure. Maybe not the size of a city, but maybe it's hollow and big enough for the party to go inside.
Moreover, what exactly does the artifact do? I imagine it kills suns in one way or another, or at least grievously harms them. If so, then when it activates would it go out and shoot down Fyr? Thus sending Maki on a quest to come back and get revenge for the planet that nearly killed its brother?
Imagine something like a hundred days of endless night if the artifact fires up, followed by Maki returning in full and bringing a hundred days of searing red light. That'd be something for the theologians to think about.
I don't want it to be immediately obvious what just happened when they activate this thing. Kinda make it a quest in and of itself out of finding out what they managed to do. I'm thinking the crystal might act as a lens for a giant laser or something. Maybe Leonard's grandpappy will wake up as a dracolich and crash through the ceiling, giving the artifact a line of sight to Maki.
Also how exactly are Fyr and Maki different? Do they embody different concepts in the popular consciousness? Are they particularly different in actual character? Are they actively shaped by the beliefs of the Oberonians? What religions exist around them and/or other gods, if there actually are any?
At this point, Maki is mostly just associated with Orcs and its effects on them. Back in the day, though, Maki was seen as the more chaotic and fiery of the two suns, partly because of his red color. He wasn't evil per se, but he was a little bit of an asshole as gods go. Fyr is and was seen as the more reliable 'life-giver'. After millennia spent in isolation harboring a grudge, though, Maki is pretty much insane and entirely malevolent, so his return is definitely an apocalypse-type scenario.
A few questions and comments regarding your map:
- I see you've put down 20 countries, but only 13 of them have names. This implies to me that you've prioritized putting down borders over fleshing out the countries. This is almost certainly a bad idea; letting your countries grow naturally as you write their histories is a much more natural and fun process than trying to fill an arbitrary number of countries and writing backstories to justify their borders.
This is true, I did prioritize the Europe-equivalent countries because that's where the party will start out. I should probably work out the Asia-equivalents a bit more, yeah.
- On that note, what kind of culture do your countries have? How do the people there live? This kind of stuff is more important than you can imagine. Making places more distinct than "Generic European Fantasy" is key to having an immersive and interesting world.
Like I mentioned, Alemic is basically the Europe equivalent of this world. That being said, I like the idea of it being based a bit more on less conventional European mythology than the standard fairytale stuff. For example, I think Galta's culture should be more like the Gauls than medieval France.
- Why is all of that space uninhabited? There's nothing wrong with having area where nobody lives, but there should be a reason why. Looking at real-world history, typically only the most truly inhospitable places of the Earth were completely uninhabited--even "empty" land like the Mongolian steppes or the frozen north of Fennoscandia has people who live there. Alternatively, is the empty space on the main landmass Orc territory, as your backstory seems to imply? If so, you should probably mark that--usually, even areas with no rigid nation-states occupying the region are marked with something like "such-and-such tribes" or "so-and-so territory".
Like you said, my idea of that space is mostly just a collection of Orcish tribes. I like the idea of there being a larger Khanate further west, though.
- How big is this stuff? Like, is this place Europe-sized or Asia-sized? Does it take a week to get from Espera to Eralta or a month?
I wasn't really thinking too much about this when I made this map a while ago, but I'm pretty sure the proportions are pretty close to those of Earth. That being said, I'm still a but fuzzy on travel times/distances. Most DnD maps (to the best of my knowledge) use a system of hexes with each hex representing a set distance or travel time. How big do you think each hex should be if I use a system like that?
- Where's this High Lake? Is it the hole-looking thing at the Galta-Alem border?
Yeah, you got it. In my mind it's a crater formed from the impact of a comet, with the lake itself being the melted ice from the comet. I know the physics doesn't really check out on that, but it's fantasy, so y'know.
- What is the purpose of the seemingly uninhabited landmasses to the east and south?
I'm still not entirely clear on what to do with those. It's possible they're uninhabited, but I'm not sure.