Metagame concentration
How few decks Pauper 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) (4 archetypes)
B-Tier
Viable archetypes (2-5% meta share) (11 archetypes)

Dimir Faeries

Ruby Storm

Grixis Faeries

Golgari Gardens

Dimir Affinity

Jund Wildfire

Spy Combo

Mono Red Rally

Ephemerate Tron

Blue Terror

Mono-Blue Faeries
C-Tier
Low-meta archetypes (1-2% meta share) (43 archetypes)

Mono-White Aggro

Turbo Fog

4c Affinity

Familiars

Boros Moxite

Azorius Affinity

Rakdos Madness

Gruul Ponza

Gruul Ramp

Izzet Terror

Esper Affinity

Mardu Synthesizer

Inside Out Combo

Boros Synthesizer

Esper Ephemerate

Glintblade

White Aggro

Jeskai Ephemerate

Azorius Gates

Boros Bully

Black Sacrifice

Tron

Snacker Gates

Food Gardens

Dredge

Dimir Terror

Burn

Poison Storm

Cycle Storm

4c Ephemerate

Walls Combo

4c Pestilence

Grixis Control

Jund Gardens

Jeskai Affinity

Mono-White Heroic

Kiln Fiend

Infect

Mono-Black

Izzet Faeries

Devotion

4c Synthesizer





