People have complained about not having enough cards to fill out colors for limited with the switch to play boosters and I've started noticing an uptick in hybrid mana cards which would be a solution to this problem. Is this correlated, or is it just a coincidence that we've recently seen more hybrid and that it helps address this issue?

It’s correlated.

Do you think there could ever be a devotion variant that cared in some capacity about mana symbols in cards in your graveyard?

Chroma could do that. If we did devotion out of the graveyard it would have an additional word, something like grave devotion.

serra sphinx is one thing, but when are we getting that golgari 5 mana 4/4 flying vigilance?

I have faith it will eventually happen.

Could the gift mechanic work as a triggered ability instead of something solely done on cast? Such as "when this creature attacks, you may Gift a Food."

I don’t know if the current version of gift can do that, but as it’s a cost, I assume we could tweak things to make that work. Just a hunch though. I’m not the Rules Manager.

Wizards has introduced almost 30 black angels, even though they're usually described as manifestations of white mana. I don't have a problem with this except yall have only made 5 white demons, 3 of which are from New Capenna! Any thoughts on why, and can I get a maybe on more white angels in the future?

I can promise more white Angels.

Concerning power creep, there may be a comparison and distinction to be made between distorting a format and adding relevant cards to a format. If a card is relevant, it shows up in decks, right? Maybe even a lot of decks. That's good for a format-relevant product. Otherwise, why even make the product?But then what is the delineating mark between format change (good) and format distortion (bad)?One could argue that Serra Angel is an example of format change. Arguably obsolete, nobody is really objecting to the card's irrelevance in eternal formats.So. What is that dividing line? Is formst chsnge just 'distortion over time'? I would argue that healthful change is oft misperceived as power creep, but it took a lot of cards in Commander before we figured out that '2 MV ramp and repeating value' were the prime culprits in accelerating the casual format beyond its 'battlecruiser Magic' roots.I'm not making a big argument one way or another, just trying to stimulate a brain or two..

For starters you’re not using “power creep” as I use it on this blog, but for the sake of saying the same thing for the tenth time, I understand you mean the increase of cards impacting older environments. You bring up the other thing we haven’t been talking about. Card influx talks in neutral terms. Add N relevant cards and impact the environment a particular amount. The faster you add N, the quicker it changes. The sets designed for older formats aren’t adding in cards neutrally though. They are adding in suites of cards built around particular mechanical themes. Adding in whole suites of cards changes environments more quickly as the threshold to make a deck theme relevant gets hit more quickly. That’s the other big impact of designing for a format. It causes you to impact it faster as you are designing whole swaths of mechanical pieces, not just cards. That’s very relevant to the topic at hand.

any idea why cards that can make colorless OR colored mana (like nightshade dryad) are templated with one ability for colorless, and one for colored?

The other way to write it would be “T: Add W, U, B, R, G or C” which would make give it a five-color color identity and make the card very hard to play in Commander.

“The biggest problem is that we have to cost cards with whole mana symbols (other than Un-sets, we don’t do ½) and many abilities simply aren’t worth a whole mana by themselves.” Did you miss-read this Question Mark’s question about vanilla creatures as French vanilla?

I didn’t misread it. They were asking why card #A, a vanilla creature, and Card #B, a creature with the same stats but with rules text cost the same. The answer is the rules text usually isn’t worth a full mana, so removing it doesn’t make the creature one cheaper.

Has there been discussion of keywording Impulse? It's a lot of words to be able to shave, but also there are at least 4 fiddly bits that change on a card by card basis (your deck or opponents, cast of play, until end of turn or until the end of your next turn, do you get mana fixing)

It has been talked about many times.

Hi Mark!
With Karlov Manor and Bloomburrow, we’ve now seen two cycles of common creature cards that can be played with Hybrid mana in sets that otherwise don’t have a major hybrid theme. Does this mean that we’re going to see an increase in the number of hybrid commons in the future?

Common hybrid cards have proven to be a valuable tool in helping to raise as-fan of certain themes for limited, so I do think we’ll see it used again.