Metagame concentration
How few decks Modern 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.
A-Tier
Competitive tier archetypes (5-10% meta share) (5 archetypes)
B-Tier
Viable archetypes (2-5% meta share) (11 archetypes)

Esper Blink

Ruby Storm

Living End

Domain Zoo

Devoted Combo

Eldrazi Tron

Goryo's Vengeance

Tron

Neobrand

Belcher

Eldrazi Ramp
C-Tier
Low-meta archetypes (1-2% meta share) (43 archetypes)

Esper Midrange

Jeskai Prowess

Boros Burn

Mono-Black Midrange

Esper Reanimator

Rakdos Aggro

Grixis Reanimator

Death's Shadow

Boros Ponza

Izzet Murktide

Jeskai Energy

Hammer Time

Titan Shift

Azorius Blink

Indomitable Creativity

Eldrazi

Izzet Prowess

Dimir Murktide

Generic Ragavan

Grixis Control

Temur Prowess

Yawgmoth

Izzet Steel-Cutter

The Rock

Merfolk

Jeskai Blink

Mono-Green Eldrazi

Bant Midrange

Through the Breach

4c HollowOne

Bant Blink

Gruul Basking Broodscale Combo

Rakdos HollowOne

Sultai Midrange

4c Midrange

Mill

Song of Creation

Grixis Midrange

Azorius Control

Dimir Midrange

Jeskai Ascendancy Combo

Dimir Reanimator




