Not exactly a question, just sending my appreciation that you take the time to respond to things and engage with the community. Love ya.
But for an actual question, I grew up on that one red black planar chaos deck with the madness effects. How you guys feel about those?

Thanks. It’s hard not to look back on Planar Chais things with a little bit of trepidation.

Magic taught me how to lose.I used to be both super competitive and an incredibly poor loser. It was affecting my relationships. One of the worst ways that cane out was while playing commander, since there was one guy in the pod a with a much higher budget and I was always throwing tantrums about how that was unfair.So I decided to fix it. I built a deck headed by Olivia, Mobilized for War full of madness draft chaff. The deck had enough synergy that playing it felt like I was doing something, like winning was possible, but wasn’t powerful enough that winning was actually *likely.*Then I sat down with that deck and I forced myself to keep losing games until I could tolerate it.It worked! Nowadays people love playing with me and I always try to make sure everyone’s having a good time, regardless of who wins. I’m a much better person because of this game. Thanks for everything that you do!

Thanks for sharing.

I think a previous asker was mixing up Parasitic mechanics with A-B mechanics; the latter being something like Madness, where you need discard outlets to enable the Madness cards.

That sounds like a good guess.

Hi Mark, Looking at the MH3 Spoiler for the new emrakkrul card, is her madness cost pay 6 (C), mechanically different than:
madness: (C)(C)(C)(C)(C)(C)
?
Thanks for taking time to respond to questions

No. We just template four or more mana symbols outside of the mana cost as “number <mana symbol>”.

Would it take a bus hitting R&D for a set where Black leans heavily into hand destruction and tutors, for Blue to lean very heavy into counters and extra turn effects, for White to lean into taxing and global destruction effects, Red to lean into land destruction and multiple attack step effects and Green leaning into Ramp and fog effects?

With time, we’ve learned certain effects work better when we’re careful how much we do of them in any one set. The set you’re suggesting is simply messing with many of these themes in a volume I’m skeptical we’d do. But as I like to say, I never say never. Although all these themes, at the same time, seems like madness.

if/when a mechanic that uses another mechanic like a card with adventure and the adventure having replicate/madness

When, but. It’s likely in something like a Modern Horizons product.

Is Madness so high on the storm scale because of the confusion surrounding zone changing and how it interacts with graveyard hate? As a mechanic, I think it has a tremendous amount of depth, flexibility and design space, but it can be very powerful and sometimes confusing. I also thought it was generally well-liked by the player base.

It is generally well liked by more experienced players, but less so by less experienced players. It’s difficult to design around and hard to balance.

Greetings MaRo, big fan, love this game you're a big part in making, and I especially love your enthusiasm for it! It's truly infectious, and your passion clearly shows.

Anyway, as the Officially-Unoffical Un-Rules Manager, I had a question if you have the time. My play group is going to be running an Un-commander night soon where un-cards are totally legal and where we each get to pick a legendary creature, planeswalker, or The Grand Calcutron from an un-set and use that as our commander. I, in the spirit of someone who loves Magic history, am going with Richard Garfield, Ph.D.. Going to do some random number generator table to just increase the randomness, to try to not keep the deck super duper busted and, most importantly, to ensure my turns don't take forever because of decision paralysis. However, this leads me to a few questions about how certain mechanics work when I control Richard Garfield, Ph.D.:

1. Flashback (or really any "cast from the graveyard" effects/abilities, but flashback is the main one). If I have, say, Think Twice in the graveyard and I pay the flashback cost, am I limited to playing it as any card that costs 1U that also has flashback, or can I play it as any card that costs 1U? I'm assuming the former, but wanted to double-check on this point.

2. Alternate casting costs, like delve or madness. I assume that, if I am choosing the pay the alternate cost, it is already too late for me to play a particular card as a different card instead? For example, if I exile 7 cards from the graveyard to delve Treasure Cruise, I can't cast it as Scornful Egotist, right?

3. Suspend, and this is the one I am the least sure about so if you only have time for one rules question (I know you're incredibly incredibly busy making this game we all love, so I completely understand if that's the case), I would love an answer to this. If I have a card suspended and the last time counter comes off allowing me to cast the card, can I cast it as a different card of the same mana cost? For example, if I have Riftwing Cloudskate on suspend and I remove the last time counter, could I cast it as, say, Slime Monster? Also, for this question, does it at all matter if I suspended Cloudskate before or after I cast Richard Garfield, Ph.D.?

Thank you in advance for your help and for your time, and I am really looking forward to all that Magic has to offer! Can I shill for a second for a plane based around the Klondike Gold Rush with Western elements?

1. To use flashback, you must treat the card as a card with the same mana cost, and then pay the flashback costs that actually appears on the card that you are “copying”. 2. Yes, it is too late. Once you start paying additional costs, you’re locked into it being that spell.3. Suspend works similarly to flashback. You can “copy” any spell with the same mana cost and then pay the suspend cost that appears on that “copy”.

Did anyone express disappointment that Madness was not in Crimson Vow, especially with blood tokens? I know it's a tall ask because it's an 8 on the Storm Scale but I'd love to see it. I was sad because I love the mechanic but I understand the compromise and am hopeful it will return someday.

Vampires (as well as the rest of the relevant creature types) only got one mechanic and it was Blood tokens. We were aware that Blood tokens would play well with the Vampires with madness in larger formats.

Was madness considered for this set? It seems like it would have great synergy with blood tokens. If it was, why was it dropped?

Madness was associated with the Vampires last time we were on Innistrad, so it would be odd to have it not on Vampires. Each relevant creature type only got one mechanic, and Blood tokens were the mechanic for the Vampires.