Made some changes. Scaled the starfield background per Ralf's tip. Moved the asteroid belt to the Inner System where it could be showed off more dramatically. Added a comet zone in the Remote System, using comets from CA80 HighSpace Star Systems. Changed the glow on the wormhole to a light blue so it would pop more. Decided to add some intrastellar jumpgates (like man-made wormholes) within the solar system, and for those I used Singularity symbols from CA80. And since I was already dipping into that annual anyway, I decided to swap out the planet symbol for the Jupiter-like planet Lythí and replace it with a planet symbol with rings from CA80.

For the final lair, the volcanic Womb of Ashes, I wanted to have some sigils engraved in the floor where the final ritual is being performed by all the covens united as a Grand Coven of 13: the Drowned Sisters' Grotto (sea hags), the Withering Glade (forest hags), the Miremothers' Den (swamp hags), the Frostmaidens' Cradle (alpine hags), and the Arch-hag at the Womb of Ashes. (Plus, it gives me an excuse to once again use the Marine Dungeons brass inlay that I love so much.)

I had previously discovered that some of the varicolor symbols used in CA15 Heraldic Symbols (2008) can be set to the magenta color to work as an inlay. I was delighted to discover that some (not all, but some) of the vector symbols from the overland map sets could also be exploded and turned magenta to do the same.

So...here are my sigils for each coven. The Forest Hags' was the easiest -- it comes exactly as is from the Marine Dungeons annual. Originally I was going to use the symbol of the tree without the runed circle, but then I realized that the runed circle could tie them all together and strengthen a visual similarity. The shell for the Sea Hags' symbol also comes from Marine Dungeons. The snake for the Swamp Hags' sigil comes from CA15. The water waves, swamp grasses, mountains, and volcano all come from CC3 Vector BW overland style that comes with CC3. The fire symbols were ones I made for one of the Trial of the Elements map in the Atlas. I couldn't find snowflake images that I liked, so I designed those ones myself specifically for this.

I thought I was going to have to draw a lot of stuff myself, which is totally not my forte. Really delighted to find that some of the vector images could work for this.

Started to work on the underground interiors, including experimenting with creating places for the captives, who are encased in ice.

For those prisons, I experimented with putting the frozen water fill on a sheet with a variety of sheet effects, including beveling and a transparency effect. Unfortunately, the lighter frozen water fill has a bit of a transparency acne problem.

But that problem seems to disappear with the darker water, which also has a stronger contrast with the floor, so I'll just go with that.

Here's the above-ground areas of the Frostmaidens' Cradle, lair of the alpine hags. The underground areas will make use of the Ice Caverns annual.

I also drew in shadows beneath the elevated huts so that I could create battlemaps with the houses hidden, for combat underneath the houses. (They're supposed to be about 10 feet off the ground.) I was going to use tree stumps as the poles supporting the houses, but the Marine Dungeons columns were right there and I do love them -- and there are versions that conveniently already have the ripple effect added for the huts that overhang the water..