MTG Weekly Price Spikes: 3/21 – 3/27

Last updated on March 27, 2026

Diminishing Returns | Illustration by Greg Opalinski

Fish and saprolings (and unofficial spoilers!) are making the biggest waves in the Magic card market this week. So, first and foremost:

/// SPOILER WARNING!!! ///

The biggest price spike this week is related to an unofficial spoiler revealed earlier this week. If you'd rather enjoy the upcoming MTG sets at the official pace, you may want to scroll (without peeking!) through the first card in today's article. Having said that, let's dive in!

Sprout Swarm

Sprout Swarm indeed has the flags of a card that can spike as soon as players find a way to break it: It's pretty old, has only two printings from Future Sight and The List, and as of late it's been pretty popular in Gruul Aggro decks in Pauper.

But today's massive spike (from about $0.75 to well around $5.76, about 670% increase in a single day), is not about what this green instant does, but what it will do.

Source: MTGStocks

Specifically, what it will do with Witherbloom, the Balancer, an elder dragon from Secrets of Strixhaven that has been unofficially spoiled and which has Redditors all hyped up: 

Looks like WotC thought that convoke was not strong enough, and has given Witherbloom affinity for creatures (which means every creature on your battlefield reduces its cost by ). And this good ol' dragon then gives all your instants and sorceries affinity for creatures.

And guess who goes infinite in that scenario? Yes, of course: Sprout Swarm!

Dandân

The original Arabian Nights Dandân is hot this week, after the Dandan Secret Lair sold out last week in less than 30 minutes! Near-mint copies of the original print were already priced at around $22-25, so it was far from a cheap card. But WotC releasing the Secret Lair version of decks for this player-run format have pushed the fish way up, now costing around three times as much as last week.

Source: MTGStocks

You can still buy near-mint copies of later Dandân‘s reprints for a lot less (usually below $2), like if you aim for the Chronicles or the Fifth Edition versions.

But if you want the original, it's currently listed around $60-70!

Diminishing Returns

Dandân hype is not limited to the fish, though! All prints of Diminishing Returns are seeing upward action, with the original Alliances print nearly tripling in price (from about $7.50 last week to over $22 today).

Source: MTGStocks

Diminishing Returns was already seeing quite a bit of Duel Commander play in Leovold, Emissary Of Trest decks, but this blue sorcery goes like chips with fish in a Dandan deck and is seeing a price increase across the board: Later reprints cost less than the Alliances original, but they are also going up.

Declaration of Naught

I'm not entirely sure what's up with Declaration of Naught. It sees no casual Commander play, nor has seen recent competitive play (a couple of years ago it saw top-tier play in Modern, but that's no longer the case). And I'm not alone scratching my head here. Perhaps a content creator hyping it up?

Source: MTGStocks

At any rate, this blue enchantment went from about $8 to around $29 since last week.

If you happen to have a hunch why, let us know in the comments!