Do Myrs truly have an alignment? I know they were built by Memnarch, but after that they kinda just hung out like lil robot goblins, until the Phyrexians, where they were... active dissedents? But other than some cards it just seems like they were just useful creatures for the Rebels to utilize.

The Myr work for whoever will allow them to be useful.

While I don't think The Skyship Weatherlight qualifies as a character, it does eventually turn into Weatherlight Compleated which does seem to qualify as a character since it moves of its own volition even after it's powerstone was removed. The question comes down to whether naming the character will count the machine that became it. So for a similar question: If I name Memnarch with Vorthos, will it count towards cards with Mirari in them?

If you want to name Weatherlight as a character, I won’t stop your fun. Have at it. Memnarch can count the Mirari, why not?

Given the new expansion of colored artifacts, if Memnarch were printed today, would it have blue in its casting cost?

Probably.

Mark, Today I have become a father :) Can I get a “maybe” on a creature card with “father” in its name? There are mothers (and smothers), sons (and arsons), sisters (and resisters), daughters, brothers and children, but neither Memnarch, nor Angrath are fathers by their cardname... And Bazaar of Baghdad doesnt count!

Had Karn been a legendary creature rather than a planeswalker in New Phyrexia, he was going to be called Father of the Machines.
As far as s new card with “Father”, Maybe. : )

Hey Mr Rosewater it was my birthday yesterday can I please have a fact about my favourite Legendary Memnarch?

Memnarch is infected by Phyrexian oil in the first few pages of the original Mirrodin novel, but few caught its significance at the time. Happy Belated Birthday!

Is Memnarch Phyrexian?

Not that I know of.

You've mentioned before that hints about the Phyrexians were hidden in the original Mirrodin block from the outset, but apart from the mycosynth, which always struck me as an easy retcon, I find them hard to see. Do you think we'll ever get an article or a podcast pointing them out, similar to how you've highlighted the jokes in Unhinged that may have been missed?

That will require some research as there’s no one left from the creative team that worked on Mirrodin to get all the references. The most obvious clue happens in the beginning of the Mirrodin novel where Memnarch discovers the Phyrexian oil.

So how did the Memnarch use a soul catch if devices like portals and inter dimensional travel machines don't work anymore?

They exist. They are just much, much rarer than they once were.

"Charms are like any Magic card. You can only play them in a deck if you have the mana to cast them." Aww, you made Ornithopter and Memnarch sad!

Every deck has the mana to cast them. : )

The Mirari was either turned into Mirrodin or Memnarch. I don't quite remember which, but I want to say Mirrodin.

It was Mirrodin but that doesn’t mean parts of the Mirari if not the whole thing is still on Mirrodin.