If silver-border and black-border cards have to be printed on separate sheets, how was Steamflogger Boss printed in Unstable? You didn't have a sheet just for it, surely?

It was printed on the land sheet, which wasn’t silver-bordered. That’s why when you got a Steamflogger Boss, it was in your land slot.

I understand that maybe you can't answer this question, but I figure I'll give it a go. If none of the cards in Unfinity were eternal-legal, and they had been printed with silver borders, wouldn't you need to use gutter cutting there anyway? Did Unstable and Unsanctioned use gutter cutting?

You don’t need to gutter cut if all the cards have the same border. The only black-bordered cards in Unglued, Unhinged, and Unstable was on the land sheet. (That’s where Steamflogger Boss was reprinted.)

I love the idea of a Future Sight II (if only because I'm a steamflogger boss fan). Do you think you'd be able to rattle off a whole bonus sheet of "future shifted" designs without much trouble, or is predicting the future design space a major challenge?

I’m up to the challenge.

If it was possible to print a black bordered card in Unstable which was silver bordered, why wasn't it possible to print silver bordered cards in Unifinity instead of the acorn stamp ?

Steamflogger Boss was printed on the land sheet.

I'm building an Unstable cube. What would be your top five (or more!) recommendations for black-border cards to add to it?

#1 is Steamflogger Boss. I’d also add a bunch of die-rolling from AFR. What would others suggest?

Will we ever go back to the future? Meaning a set like future sight (not as far as having dozens of new mechanics in one set, but the theme of “this teases 15 years of Magic’s future”). I understand there are new world order concerns here, BUT, it has been so great when a card like Steamflogger Boss finally got its “real” printing or when the enchantment creatures first made a debut in Theros!

My initial pitch for Modern Horizons was Future Sight 2. I keep suggesting it, but not a lot of bites just yet.

Could you reprint black border “joke” cards (storm crow, one with nothing, etc) in un-sets?

Steamflogger Boss was in Unstable, although it had to be on the land sheet.

What I was trying to say is that Steamflogger Boss found its place into an un-set. It has the black border even in its final release but still seems not a card meant to be seriously played in a regular format. All the time-shifted cards from Future Sight where playable on their own with some utility while hinting to new mechanics; Steamflogger Boss didn't have anything to synergize with and still hasn't to this day.

It has “Changelings get +1/+0 and haste.”

Hello Mark, I would like to please invoke the ritual of birthday trivia! As such I would like your best Goblin fact please and thank you!

Goblin is the only creature type to appear in a different border color than every other card in the booster. The card was Steamflogger Boss in Unstable. Because it was a reprint, it had to be black border. It was put on the land sheet (the basic lands were borderless) to accomplish this. All the other sheets (where the rest of the cards came from) were silver-bordered.Happy Birthday!

Surgeon ~~General~~ Commander from Unsanctioned says "Whenever you enchant, augment, or mutate a creature you control." Now we know what two of those are, but not mutate. Is that a joke similar to Steamflogger Boss's contraption assembly? Does combining creatures with Grusilda count as mutating?

Mutate is a keyword you all haven’t seen yet. And fear not, we’ve learned from Steamflogger Boss to not make-up mechanics we have no intent of making.