Along similar lines, do you see a possibility for more Planar Chaos fun in Magic's future? Seeing colors do things they don't usually do is always entertaining. I'm especially enjoying looking at older sets and seeing how the color pie "used" to work, before the rules were more formalized and documented (cards like Lifeforce, Tsunami, and Deathgrip being some more extreme examples).

We don’t want to make a set where colors are breaking color pie, or even bending it too much in aggregate. That said, there is potential for a set where we shift things into colors that can do things, but haven’t had as much chance to do them.

are enemy color hate cards not something we're likely to see anymore? talking about cards like Pyroblast, red elemental blast, Deathgrip, Lifeforce, gloom and so on.

We still make enemy color hate cards from time to time. They’re not as powerful as the ones in early Magic and they all have to be effects that are in color.

Lifeforce / Deathgrip, White Knight / Black Knight, Blue Elemental Blast / Red Elemental Blast. These mirror images were nice ways of showing the colours in opposition without it being mistaken for a cycle. Would you do such things again (without colour pie violation or as severe hosing) as a way to show enemy colours?

We do enemy mirrors from time to time.

Original Alpha color hosers were brutal, but most of them seem like color pie breaks today. Would any of them still fit in the color pie today? (FYI: Karma, Conversion, BEB, Lifetap, Deathgrip, Gloom, REB, Flashfires, Lifeforce, Tsunami)

Richard’s original vision was that colors could use their enemies’ abilities to hose them. That hasn’t been true for most the life of the game.

Hello Mark. In ye olden days of yore when i first started playing there were a lot of cards directly aimed at crippeling an enemy color (beb, reb, karma, volc. eruption, conversion, deathgrip, lifetap, etc) what happend, unfun/narrow/something else?

We call those color hosers. R&D has kind of soured on them over the years as we don’t think they’re all that fun. We still do them from time to time but at a much lower power.