Metagame concentration
How few decks Duel Commander is, month by month, against every ban on record. Each point is the chance that two decks drawn at random from that month's field are the same archetype (the Herfindahl–Hirschman index), shown as the number of decks a field that concentrated is equivalent to. How this is calculated
Lower means more concentrated. Months pooling fewer than 200 classified decks, or fewer than two events, are left blank rather than plotted — below that the reading moves more with how much data the month held than with the format. Decks the classifier could not name are excluded; each point's tooltip reports what share of the field that left.
Tier history — top archetypes
The 8 biggest archetypes by meta share, on one axis. Each line is the score its tier is computed from, so a ban or a set release shows up as the whole field rearranging.
The Y axis is the score each archetype's tier is computed from: for measured points a 60/40 blend of MTGGoldfish meta share and TopDeck top-8 appearances, for reconstructed ones the meta share our classifier derives from standings. Dashed horizontal lines mark the tier thresholds.
The shaded span left of the dashed vertical line is reconstructed from historical standings (issue #214), not measured at the time; those segments are drawn dashed, and they break rather than join at the changeover because no single reading bridges the two. The two eras are scored against different denominators — a reconstructed share is a slice of our classifier's archetypes, a measured one a slice of MTGGoldfish's curated list — so compare shapes across the line, not values. D tier is reconstructed-only — the live writer floors at C — so a line can step D→C at the changeover without its score moving.
Deck costs estimate an average list at each card's cheapest printing across all printings, promos and reprints included.
S-Tier
Meta-defining archetypes (≥10% meta share) (1 archetypes)
A-Tier
Competitive tier archetypes (5-10% meta share) (10 archetypes)

Namor the Sub-Mariner

Brigid, Clachan's Heart

Nick Fury, Agent of S.H.I.E.L.D.

Winter, Cynical Opportunist

Slimefoot and Squee

Phelia, Exuberant Shepherd

Aragorn, King of Gondor

Jace, Multiverse Architect

Tony Stark

Aminatou, the Fateshifter
B-Tier
Viable archetypes (2-5% meta share) (10 archetypes)

Dargo, the Shipwrecker // Ikra Shidiqi, the Usurper

Aang, Swift Savior

Dargo, the Shipwrecker // Silas Renn, Seeker Adept

Satya, Aetherflux Genius

Kraum, Ludevic's Opus // Yoshimaru, Ever Faithful

Light-Paws, Emperor's Voice

Elminster

Glarb, Calamity's Augur

Tifa Lockhart

Azusa, Lost but Seeking
C-Tier
Low-meta archetypes (1-2% meta share) (39 archetypes)

Magda, Brazen Outlaw

Mister Fantastic

Emet-Selch, Unsundered

Vohar, Vodalian Desecrator

Kefka, Court Mage

Vivi Ornitier

Toph, Greatest Earthbender

Obyra, Dreaming Duelist

Ironheart, Clever Champion

T'Challa, the Black Panther

The Serpent Society

The Wandering Minstrel

Terra, Magical Adept

Leovold, Emissary of Trest

Bruce Banner

Niv-Mizzet, Parun

Hit-Monkey

Maralen, Fae Ascendant

Aurelia, the Warleader

The Queen of Dale

Nicol Bolas, the Ravager

Zur the Enchanter

Chulane, Teller of Tales

The Ur-Dragon

Magda, the Hoardmaster

Vraska, Soul of Stone

Atraxa, Grand Unifier

Flamewar, Brash Veteran

Thor, God of Thunder

The Beamtown Bullies

Gut, True Soul Zealot // Veteran Soldier

Mirko, Obsessive Theorist

Ghyrson Starn, Kelermorph

The Scarab God

Bartolome del Presidio

Denzilore Fatehold

Nissa, Resurgent Animist

Karlov of the Ghost Council

