the printing of the pitch elementals in modern horizons 2 (fury, solitude, etc.) and the new forces (negation, vigor, etc) indicate that this alternate cost is not something relegated to magic's past. but while we've seen the specific restrictions change (X cost for shoals, 2 cards in coldsnap, etc.) the cards exiled always need to share a color. could we see pitch cards that need a card of a second color to be exiled? or a specific card type? or multicolored cards that can pitch either color?

The challenge is not breaking the color pie. If a card does a blue effect, for example, you have to have a payment that ensures you’re playing blue.

Follow-up question on B.O.B. - Does their static ability count as an "effect" for the purposes of Doubling Season? With Doubling Season in play, I'd think that activating +1 would create 2 beebles, which would add another loyalty, which would create 2 more beebles, which would add 2 more loyalty, which would create 4 more beebles, etc. Or does the doubling only apply once? Thanks!

From the Unsanctioned FAQ: Say I have a card that doubles my token production, like Doubling Season. What happens?Doubling Season (and a few similar cards) applies “if an effect would create one or more tokens,” so it will double the initial shipment of Beebles. You’ll create eight of them as B.O.B. enters the battlefield. However, it won’t double the one created because you activate the first loyalty ability. That Beeble is created because of a cost, not an effect.However, some more recent cards like Primal Vigor don’t specify “effects” and will double any and all Beeble births.

Does the existence of modern ever stop something from being reprinted in standard? For instance, I doubt Invigorate would be all that great in standard but it might push modern infect over the top.

It’s something development thinks about but if it was something Standard really needed, I think development would use it and then see if it truly causes a problem in Modern. If it did, there are ways to address it.

What about Gisela, Blade of Goldnight in FtV: Doubling. She is my favorite doubler. Also, no love for primal vigor? Is it because its new?

I didn’t name all the doubling cards just the ones I thought of. I’ve been at it for a while. There’s more. : )

For me the feel-bad about Primal Vigor is that it's strictly worse than DS but the exact same mana cost. Had it costed 2GG instead or something it would be a cool card.

The fact that is global (not just for you) makes it not strictly worse because there are shenanigans you can do with it you cannot do with Doubling Season. Note I’m not saying it isn’t in most cases weaker, but it allows something the previous card does not.

I like Primal Vigor. But the biggest problem with it is that it doesn't help with scavenging Little Girls.

Fine, just Rite of Replication the Little Girl. : )

So... It looks like Primal Vigor is a doubling season that synergies with Infect.... While I can't imagine any other (real) card that screams MaRo more than that, is there any particular reason the "you control" clause was left out?

I’m just guessing as I wasn’t involved, but I think they were trying to make it have more of a multiplayer role as it was for a Commander product.

I'm a little sad Primal Vigor doesn't follow NWO and gives benefits to everyone. It's a perfect fix for doubling season otherwise.

I think yours understand what New World Order is. It’s a system to make sure common is not overly complex.