So I downloaded the MSE "Advanced" set last week, and as I was looking through what card templates were available, I ran across two sets called "M15 Mined" and "M15 Mineshift". They both require mana symbol files that are missing in the program completely, "magic-mana-small-mined" and "magic-mana-large-mined".
I have tried looking all over, including doing searches on the forums here, and can find absolutely 0 references to this template or the files required, even though this is where I got it from. I'm super stumped. Does anybody know where the heck I can get these files???
I don't have the actual files (in fact, I suspect there's only two people who do) but at least I can assuage your curiosity; they're frames Cajun made for Daij_Djan's set, Karsus. You can see examples there; it's a coloured circle with a pickaxe in it, meant to be used as Exert but for lands.
The templates seem to have slipped their way into Cajun's Megafile, but without their accompanying mana symbols.