The 2018 competitive season kicked off with Regional Qualifiers this weekend, and we saw some immediate shifts in the TCGplayer Marketplace.

For the uninitiated this is our twice-weekly Market Watch column, where we look at sales from over 1000 active Yu-Gi-Oh! sellers right here on TCGplayer, and tally up everything to show you the Top 10 bestselling cards from the latest sales period. Every Monday we look at secondary market action from Friday to Monday morning, and this time around that means we're looking at a slice of the marketplace that was actively shifting in response to Regional Qualifier results – the first Regionals played under the new Link Summoning rules.

You can see the first batch of Top 8 Regional deck lists from Salt Lake City, Seattle, Fargo, Shreveport, Lubbock, and Parsippany over in the Deck Archive. In a nutshell, Zoodiacs remained strong: Pure builds continued to put in the biggest results, while True Draco variants made numerous Top Cuts and some players ran Kaiju Zoodiacs to stop them.

The only major adaptation these decks made for Link Summoning was to play Missus Radiant and rejigger their Extra Deck lineups to take full advantage of it. From there it was just a matter of swapping around tech cards: Ash Blossom & Joyous Spring was big since it's more useful against a range of matchups than the more specific Ghost Ogre & Snow Rabbit; Floodgate Trap Hole saw a spike in use as well. After weeks of high sales, Heavy Storm Duster only appeared in a couple of Side Decks, but it did partly contribute to the trend of fewer and fewer trap cards in Zoodiac main decks.

The good news? That wasn't all that topped. Chris Watton Top 8'd the Seattle Regional with a 60-Card Plant Zombie Lightsworn deck, capitalizing on Ryko, Twilightsworn Fighter. He played Decode Talker, Gaia Saber, the Lightning Shadow, Ib the World Chalice Priestess, and double Firewall Dragon, making way more use of Link Monsters than the Zoodiac decks. Dinosaurs made a comeback in metagames like Fargo North Dakota and Seattle, played with Yang Zings for strong early game setups hingeing on Denglong, First of the Yang Zing. And Will Preising topped the Salt Lake City Regional with Volcanic True Dracos, tributing off his searchable Blaze Accelerator Reload for Master Peace, the True Dracoslaying King to set up big disruption with a flexible field wipe off Volcanic Scattershot.

News of what happened at the weekend's Regionals was a little slow to emerge, so it's tough to say how much of the marketplace action was really a response to that info. But regardless, there were some big shifts from the patterns we saw in the wake of Code of the Duelist, and with YCS Toronto just days away any insight could prove to be valuable.

Let's get to it! Here are the Top 10 bestselling cards in the TCGplayer Marketplace from Friday to Monday.

#10: Back to the Front

The newer, and in many ways better Call Of The Haunted alternative was an immovable installation in the Top 3 in our previous countdowns, all the way back to Code of the Duelist's debut. But it fell from grace over the weekend, possibly in response to the rising trend of players simply running fewer and fewer trap cards. If the most dominant decks are largely combo-based, then reactive cards are box office poison; they just don't help you outpace your opponent because they don't feed your win. And almost everything we saw topping this weekend was effectively an explosive combo deck.

That kind of play philosophy makes any non-combo card a liability, and if the card in question is a slow trap card that may require opponent action to, say, load your graveyard? Then you're proper screwed. I'll be surprised if we see Back to the Front back in the Top 10 unless the next F&L List changes the game drastically, shifting players' attentions away from big combo strategies.

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#9: Gouki Re-Match

We saw a big push for Goukis last Monday, which was a bit of a headscratcher at the time since the deck's rarely if ever seen competitive success abroad. That enthusiasm slipped a bit over the weekend, though Gouki Suprex and Gouki Riscorpio still took the Number 11 and Number 12 spots, while Gouki Re-Match took Number 9.

Still kind of confusing.

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#8: Transmodify

Transmodify's been on and off the Top 10 list for weeks now ever since Link Strike was released, and for a variety of reasons. ABC-Dragon Buster's been a high profile deck in the OCG, though it no longer really plays Transmodify due to Link Summoning rules. And the deck failed to materialize over the weekend… At least as we know so far.

But Trickstars have been successful with Transmodify, while Goukis can use it too. It's likely a combination of those factors that drove Transmodify back into the Top 10 once again.

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#7: Pot of Duality

Card of Demise decks often see more play at the beginning of new formats, and with YCS Toronto assumedly the last Championship of our current Advanced Format, Demise is picking up some steam. Where Card of Demise goes Pot of Duality follows, and its fresh reprint in Link Strike made it even more accessible than it was before.

Will Duality prove to be too slow for the next format? That's anybody's guess, but if True Dracos survive and Zoodiacs take a hit, the Demise draw engine could become hugely relevant once again.

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#6: Terraforming

Dinosaurs and True Dracos both run Dragonic Diagram, so unless you were playing Pure Zoo this weekend or something entirely rogue, you were probably running Terraforming. Newly reprinted in Link Strike, it's in rich supply, and with new Field Spells now in play for the latest Code of the Duelist themes, this card's an absolute must-own staple in preparation for the next format.

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#5: Auram, the World Chalice Blademaster

We've yet to see World Chalice post any big results from the weekend, but results are still coming in. World Chalice emerged as the biggest and most-demanded theme from Code of the Duelist as the hype surrounding Vendreads settled to a light buzz; we've seen most of the deck's key monsters in our Top 10's at least once as a result. Now it's Auram's turn, catapulting straight to Number 5.

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#4: Blackwing - Gofu the Vague Shadow

Still the best reason to play Link Monsters, Blackwing - Gofu the Vague Shadow's an instant Decode Talker or Missus Radiant by way of Link Spiders, and the boost it offers you as a Turn 1 play is currently the driving reason to play Links. That said, few players are running Links right now anyways. But Gofu's hugely affordable, and it's almost a guarantee that the next F&L List will pull some strings to put Link Monsters front and center.

Anyone who doesn't own Gofus now should be picking them up, while speculators may be starting to smell blood in the water.

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#3: Ib the World Chalice Priestess

Still one of the best pseudo-generic Link Monsters in the OCG, and definitely one of the best here in our more limited TCG card pool, Ib the World Chalice Priestess Top 8'd this weekend in at least one case – Chris Watton's Plant Zombie Lightsworn deck. Easy to Summon as a Link 2 and only requiring Link Materials of non-matching types and attributes, Ib's a great fit for many strategies that value combo potential over name-stamped theming, which makes it a top prospect in a combo-driven format. It's like it was custom made for mish-mash "best of everything" combo decks.

With an effect that protects both itself and whatever it's linked to, Ib's great with Topologic Bomber Dragon, though we've yet to see that card materialize in a top cut. That may just be a matter of time, and it's worth noting that Ib's continued to be a big card in OCG metagames well through the release of Circuit Break. As a 40-cent Super Rare it's an easy card to justify picking up.

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#2: Missus Radiant

No surprise here: for many tournament players, Missus Radiant's literally the only Link Monster that matters, acting as a compensatory extender in Zoodiac decks that helps you outplay the limitations of the new Link Summoning rules.

Even beyond that context it's clearly the easiest way to put multiple Link Arrows on your field, and its Earth ATK boost is so powerful that it's bound to become a finer point of high-level competition starting as early as YCS Toronto. (Kelly Locke wrote a great piece on the impact of that effect and how it can be turned against its controller just last week.)

Missus Radiant's already $1.50 and it's currently on a neutral price trend. The main thing keeping it from being an even hotter prospect is the general consensus that the new F&L List will flatten its potential in Zoodiacs by… well…killing Zoodiacs. But even if that happens, Missus Radiant's still going to be a must-own for pretty much everyone moving forward. Its rarity and its status as a one-of or two-of at most keeps it from becoming the next Twin Twisters.

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#1: Heavy Storm Duster

And finally, Heavy Storm Duster was once again the biggest seller in the TCGplayer Marketplace! That's kind of surprising, because the lack of trap cards appears to have kept it from seeing almost any play in tournaments this past weekend: Will Preising sided three copies in his Volcanic True Dracos while Jeremy Cummins sided one in True Draco Zoo, but if anybody else topped with it we haven't seen the deck list yet. Small backrows and the popularity of True Draco decks, which are better countered with Cosmic Cyclone, combined with the emphasis on speed, might keep Heavy Storm Duster from seeing play until the new format.

But at the same time the card's sheer power level is so obviousl that it's smart to own a playset, and it could make some sort of showing this weekend at the YCS. Heavy Storm Duster's been coasting on its potential for a while, but the tension of the impending new format is keeping demand high. Nobody wants to sleep on something like this and then see it spike to eight bucks. It's already at a very solid $2 right now, making it the most expensive Super Rare in the set.

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That's it for this week, but we'll have one more Market Watch for you on Friday before we see how everything shakes out at YCS Toronto! Again, deck lists from this past weekend were a bit slow to appear, so lots of players are only just seeing the bulk of those strategies.

That means we're bound to see some reactions to those push factors over the course of this week, and it should make Friday an interesting read. We'll see you then!

-Jason Grabher-Meyer