I may be in the minority here, but I prefer Modrons to be goofy. It reminds me how law without compromise... well, it's goofy. Beraucracy without purpose is goofy. It reminds me of old comedies like Yes, Minister or The IT Crowd.
Now, I also like the juxtoposition of the goofy modrons lead by their much more dangerous, much more sinister superiors the Maruts. These I find a far more Borg-like force if and when you need one.
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But--that's according to the laws of physics. Magic doesn't have to obey those.Conjuration spells break the law of conservation of mass,
There's a horror movie out there that is basically that: except instead of metal, the Machine requires ACTUAL BLOOD and pretty much has people come to it or feed it other people.A group of Modrons enters a small village. Once there, they sing a song, or activate an object that plays music. The people of the village are compelled by -absolute order- to begin the construction of a machine alongside the Modrons, including using several modrons (broken down into component parts) to incorporate into the machine. This machine requires metal. And once it's reached a certain size, just pressing metal against it is enough for it to incorporate metal into itself.
The majority of the Modrons leave. A handful remain as overseers of the Machine. The villagers sacrifice all their metal to the machine. ALL OF IT. And begin hunting passers by for more metal. Eventually they start sacrificing each other to the machine. Tearing out gold teeth to feed it, making offerings of blood, which contains iron and seems to "Appease" the Divine Machine.
And that's when things start going off the rails.
The Modrons oversee the Machine's continued construction. Uncaring at the cost of lives that are being cast into the machine. It is -required- for the Great Ordering. It must be protected and continue to construct itself. If asked why they're doing this, the answer is simple:
"This is Required. The Great Ordering must continue. The Machine is a part of that Order. Give us your metal. Add it to the Machine."
And then have a fight sequence where the villagers -help- the Modrons and do their best to drag the player characters over to the Machine. Have an NPC hireling or something wearing metal armor get pressed against the Machine... and pressed out of their collapsing armor like a handful of ground beef squeezed in a fist.
"It is Required."
That show was badass as a kid.Kinda like in the old cartoon Dinoriders where they had brain boxes slapped on dinosaurs so they would follow orders.
I always wanted to stick in (as a big bad) entities from the plan where conjurations come from - and in their place comes random garbage from our world to fill in the gab there. The residents are REALLY sick of it and have decided to do something about it.
I know scp did a version of it with the heart of the broken god.There's a horror movie out there that is basically that: except instead of metal, the Machine requires ACTUAL BLOOD and pretty much has people come to it or feed it other people.
And then the Slaad try to introduce their version of the laws:Ah, I remembered it as:
Even so, magic is our way to break those rules!
- You can't win.
- You can't break even.
- You can't leave the game.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.