New cards by set

Cards first printed in the set · share of Red decks that can play them

Card	FRA · release
Stingcaster Mage	19.4%
Pompous Battlemage // Improvised Act	9.7%
Samut, Hazoret's Champion	9.7%
Tomik, Izzet Sparkmage	8.1%
Koth, the Geomancer	6.5%
Pyre Rhymer // Molten Tide	4.8%
Artifist Acumen	3.2%
Essence Burn	–

– means fewer than 3 decks. Picked up later: the share clearly rose after the release window (10+ decks, |z| ≥ 3).

Cards

No card changed clearly between Marvel Super Heroes and The Hobbit. Closest to a trend:

▼ Delayed Blast Fireball 16.0% → 1.5% z = -3.0

▼ Skred 13.3% → 1.5% z = -2.6

▲ Great Furnace 8.0% → 22.4% z = 2.4

Commanders

Share of Red decks · each builder counts once

No commander changed clearly. Closest to a trend:

▼ Chandra, Fire of Kaladesh // Chandra, Roaring Flame 6.7% → 1.5% z = -1.5

▼ Inti, Seneschal of the Sun 6.7% → 1.5% z = -1.5

▲ Gut, True Soul Zealot 4.0% → 9.0% z = 1.2

Shares are out of the decks that can play the card. A change shows when it's clear: 10+ decks on one side and |z| ≥ 3, odds under 1 in 300 by chance. Cards first printed in The Hobbit are under New cards by set.

Deck shape by window

Per deck, except the deck count and shares

Number	TLA	ECL	TMT	SOS	MSH	HOB	FRA
Decks	48	42	50	59	75	67	62
Lands	18.0	17.8	17.2	17.6	18.4	17.6	17.6
Creatures	12.6	12.6	11.5	15.1	12.9	12.9	12.5
Other spells	18.4	18.4	18.3	16.3	17.7	18.5	18.9
Avg mana value	2.00	1.96	1.98	1.97	1.92	1.87	1.86
Removal	9.8	8.0	8.9	9.5	9.4	10.3	10.5
Draw	5.9	6.0	5.5	5.3	5.4	6.6	5.9
Ramp	4.2	3.4	4.2	4.5	3.7	4.1	3.6
Tutors	0.6	0.7	0.7	0.4	0.6	0.5	0.2
Protection	0.4	0.7	0.5	0.7	0.5	0.4	0.6
Counterspells	0.2	0.1	0.1	0.1	0.0	0.2	0.1
Discard	0.2	0.0	0.1	0.1	0.1	0.1	0.0
Sweepers	1.0	0.6	0.7	0.6	0.9	0.7	0.7
Fetchland decks	13%	10%	18%	12%	16%	12%	34%
With a sideboard	40%	33%	46%	46%	51%	49%	69%

Each builder counts once per commander and set window, with their latest list. A deck counts in the window of its last edit.