efore the new legendary rules were announced, I'd been thinking about building a Glimpse of Nature/Beck combo deck in Legacy that took advantage of all the zero-mana artifact creatures in the format. The rules change happened to be just about the best thing that could happen to the deck I'd been thinking about, which relied heavily on both Mox Opal and Gaea's Cradle, two of the cards that are helped most by the new rules.
The goal of the deck is to cast Glimpse of Nature or Beck, then cycle a large number of artifact creatures into play. After you run out of artifact creatures, cast Retract to cast them all again. Cast extra Glimpse of Natures as soon as possible to reach a critical mass where you can draw and cast your entire deck, and win with Grapeshot.
Because the deck needs Glimpse of Nature or Beck to win (and Glimpse is much better, since some hands can't easily cast Beck), Serum Powder is used to find them. Once you're going off, it shouldn't hurt too much to draw a few Serum Powders.
I've taken a few test draws with the deck, and I think this build isn't quite consistent enough, but it's extremely close to forcing something to get banned, because it is very capable of winning on the first or second turn.
To clarify, under the new rules, starting with Magic 2014, if you play a Mox Opal when you have a tapped Mox Opal in play, you can just sacrifice the old one and use the new one. The same is true of Gaea's Cradle.
The trick to this deck is getting all the parts balanced perfectly. I'm playing Irrigation Ditch because it allows you to cast Glimpse of Nature on turn two with just it, and then you can play another land. Havenwood Battleground would also be a reasonable option, as would Tropical Island. The first list I drew up had Crop Rotation to cycle through Gaea's Cradles, but I think it's unnecessary under the new rules. I'd probably like more creatures, but there aren't any others that are free and come back with Retract except for Myr Enforcer, and that seems like a bit of a stretch. Gitaxian Probe and Street Wraith are options, but they don't play well with Serum Powder, and I think it's important to know if you have a Glimpse or not, rather than keep a hand that might cycle into one. The two Gitaxian Probes are filler to some extent, but it can also be nice to know if the opponent has anything. Hurkyl's Recall is also an option if more Retracts are desirable.
Sam Black is a Platinum Pro Player and longtime writer for StarCityGames.com. He is a respected deck builder and took over Daily Decks for the first half of 2013. If you have an original deck you'd like to see featured, email him with the link above.