New cards by set

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

Star Trek starts Nov 16. Decks built with its cards before then count in Reality Fracture, so these are early brews.

– 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 The Hobbit and Reality Fracture. Closest to a trend:

▼ Steelshaper's Gift 11.7% → 2.2% z = -2.5

▲ Goblin Engineer 2.9% → 11.2% z = 2.3

▲ Chain Lightning 23.3% → 38.2% z = 2.2

Commanders

Share of Boros decks · each builder counts once

No commander changed clearly. Closest to a trend:

▼ Rograkh, Son of Rohgahh & Yoshimaru, Ever Faithful 11.7% → 4.5% z = -1.8

▲ Zirda, the Dawnwaker 1.9% → 5.6% z = 1.4

▼ Lightning, Army of One 8.7% → 5.6% z = -0.8

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 Reality Fracture 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	66	49	61	88	102	103	89
Lands	17.3	17.4	17.7	17.7	17.2	17.9	17.6
Creatures	15.1	14.8	13.2	14.7	15.2	14.3	14.2
Other spells	16.4	16.4	17.8	16.4	16.2	16.7	17.1
Avg mana value	1.95	1.98	1.85	1.94	1.95	1.89	1.85
Removal	7.7	7.6	7.2	8.0	8.1	8.1	8.4
Draw	5.1	4.5	4.3	5.1	5.3	5.0	5.2
Ramp	2.7	3.0	2.7	2.5	2.7	3.0	2.9
Tutors	0.9	1.0	1.4	1.0	1.2	1.5	1.2
Protection	3.2	3.1	3.0	2.9	3.5	3.8	3.8
Counterspells	0.3	0.1	0.1	0.2	0.2	0.2	0.3
Discard	0.0	0.1	0.0	0.0	0.1	0.1	0.0
Sweepers	0.5	0.5	0.7	0.5	0.6	0.4	0.6
Fetchland decks	55%	47%	54%	41%	58%	56%	65%
With a sideboard	50%	63%	51%	58%	60%	60%	60%

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