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) (2 archetypes)
B-Tier
Viable archetypes (2-5% meta share) (13 archetypes)

Ruby Storm

Grixis Control

Bogles

Boros Moxite

Blue Terror

Mono Red Rally

Spy Combo

Golgari Gardens

Ephemerate Tron

Elves

Jund Wildfire

Mono-Blue Faeries

Mono-Blue Delver
C-Tier
Low-meta archetypes (1-2% meta share) (44 archetypes)

Turbo Fog

Dimir Control

Familiars

Esper Ephemerate

Esper Affinity

Mono-White Aggro

Snacker Gates

Azorius Affinity

Food Gardens

Gruul Ponza

Dimir Affinity

Dimir Faeries

Gruul Ramp

Tron

Cycle Storm

Mardu Synthesizer

White Aggro

Inside Out Combo

Izzet Terror

Boros Synthesizer

Dimir Terror

4c Affinity

Dredge

Burn

Rakdos Madness

Boros Bully

Azorius Gates

Jeskai Ephemerate

Black Sacrifice

Glintblade

Poison Storm

Esper Faeries

Slivers

Infect

Walls Combo

Devotion

Selesnya Gates

Mono Red Pingers

Mono-Black

Jeskai Affinity

Goblins

Azorius Faeries

Kiln Fiend


