Huh. So much more expensivbe than Fog because you're supposed to abuse your way around it? I guess this set's creatures are about 50% gold, so it works. Prett ymean that you can cast this after blockers are declared though.

­Root Snare infers that Fog might be undercosted nowadays.

AFAIK fog effects generally suck - especially in limited. They are negative card advantage that tend to end up delaying the inevitable. We've seen cards like Defend the Hearth / Commencement of Festivities recently that are lackluster as well even though for they provide a lot of value by making it so that you get the best part by preventing damage to face, but still allow you to pick up the good trades.

Turbo Fog as a deck concept is so exceptional because outside of that those cards aren't that good. So it's an exception that proves the rule.

Examples of 'great' fogs would be Tangle and Moment's Peace, but similarly to life gain cards, they aren't necessarily something you want in your environment since they can slow down it a lot.

Symmetrical Fog is very different than this though. The ability to use this with multicolored creatures or just as a green counterspell against some damage-based removal is nice.

The fact that you can use this aggressively to turn trades into one-sided affiars is the power of this. Maybe it should be cost like Tanglesap, but this set might justify the higher cost.

"Exception that proves the rule" is a logical fallacy. Turbofog in constructed is the exception. You only need one exception for there to be a problem. And it's possible that Wizards is pushing Fog's casting cost up in general because, if that deck ever became a tier one deck, it would likely result in a very boring Standard environment.

But maybe they just printed a weak Fog for a year. It happens.

The way I see "exception that proves the rule" here in the case of turbofog is that fogs are nigh always unplayable in constructed and because of that a deck such as turbofog is an exception. The fact that there is a general consensus and awareness that fogs suck is what makes turbofog exceptional. If they saw common play in constructed and such, it would be normal - it wouldn't be breaking any "rule."

Speaking of turbofog, yes, it can be problematic thing to have, but its existence relies on the availability of fog effects even more so than in their effectiveness. Having one playable fog effect in your environment does not power up that archetype alone... unless it's like Constant Mists or something that you can just keep on repeating :)

Even if this card was used effectively to be entirely one-sided, it at its very best, would still be only a lousy version of Safe Passage.