How come cards like the “will” cycle from commander legends or the free spell cycle from commander 2020 say “if you control a commander” and not “if you control your commander”. The VAST majority of the time these are the same thing, so I’m curious why it was decided to have them be worded the way that they are

Sometimes templates change over time.

Could mutate be a theme in a supplementary set (other than Commander 2020)? It would be cool to see it in something like Modern Horizons.

It would have to be a higher complexity set, but Modern Horizons does fit that bill.

Is "graveyardiness" in a non-graveyard set something that comes from Set Design or Vision Design? I'm thinking about Ikoria as an example, where there's a fair bit of graveyardiness (three of the mythic mutate creatures care about the graveyard, plus the mutate commander from commander 2020) but it isn't a graveyard set.

Vision design will choose mechanics and themes, but those can be changed by set design. Play design will also sometimes ask for a certain theme to be played up on a card or cards to help with a constructed theme.

Hi Mark happy friday! Is there an article or page on the mothership that details how MTG's numbering system works (new cards before reprints in some sets, hybrid vs multi color, full art + promo full art, etc). If not, may I request one? After many, many years I think i've got it, but I know a lot of people struggle with some of the wackier sets where card order isn't as intuitive (Alara, Commander 2020, Battlebond)

I’ll pass the suggestion along.

Mark, my seasoned group of friends has extremely enjoyed C20 out of the box. The decks are well balanced and create enjoyable gameplay against themselves. Lately they’ve been spending more time playing pre-cons then their own custom brews. Can you pass along our appreciation to the commander team for great balanced gameplay? Thanks!!

I will.

Ikoria/C20 spoilers are now over and so I can officially say that this was the best and craziest spoiler season I've seen besides WAR. The kaiju teases before the reveal video, finishing the Ultimatum cycle, the bombardment of godzilla alt-names, the entirety of both the Apex cycle and Mutate itself? As a green-leaning Timmy this is an amazing set and a great spoiler season. I would like to request virtual high-fives be given to everyone who worked on this and especially to whoever made Mothra.

Virtual high fives to be applied.

Are the cards in C20 that also appear in IKO printed with the IKO expansion symbol in both products?

There are definitely cards that appear in both the main Ikoria set and the Commander decks. I’m not sure how the expansion symbol is handled.

Mark, can we know the colors of Commander 2020 decks?

Eventually.

Maro, in 2017 came in Commander: jund, esper and bant, in 2018 came: sultai, naya and jeskai, what is the chance in ikoria's commander 2020 to come: abzan, grixis, mardu and temur?

There’s a chance.

Why was Arcane Signet printed in the Brawl precons rather than Commander 2020? I still have yet to find a single person who actually plays Brawl and what I've been seeing is a lot of talk about buying the Brawl precons for the Arcane Signet alone.

It was printed in a Brawl deck because we wanted it available for Brawl.