I picked up Artifacts Set 2 for Mage Knight Dungeons on the secondary market, and I really like the look of these prepainted pieces. I plan on using them for terrain and/or objectives for Melee/Wizard, Frostgrave, Ghost Archipelago, and similar games.
You can never have too much scatter terrain in your skirmish games, and this set even came with some rules for special game effects that I will try to port over to my own scenarios.
As you can see from my Warhammer Saurus hero (used as a Heritor for Ghost Archipelago), these castings are the right scale and style for dungeon crawls. I hope to see them in action soon.