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Efficient Construction

· Enchantment · Commander Masters (CMM)

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Times Brought

283

Decks Running

143

In Decks

—

Decklist Inclusion

—

Format

Multiplayer 1v1

Showing 1v1 (duel) data only. 1v1 is a different format from multiplayer Commander, so these numbers are not comparable.

Card text

Efficient Construction

Enchantment

Whenever you cast an artifact spell, create a 1/1 colorless Thopter artifact creature token with flying.

Commander Masters (CMM) · Uncommon · Illustrated by Jonas De Ro

Final zone distribution

67 instances

40.3%

Battlefield

17.9%

Graveyard

4.5%

Exile

37.3%

Hand

Commanders that played this card

in tracked games

1 Urza, Lord High Artificer 15 decks
2 Mendicant Core, Guidelight 13 decks
3 Breya, Etherium Shaper 12 decks
4 Sai, Master Thopterist 10 decks
5 Urza, Chief Artificer 10 decks
6 Golbez, Crystal Collector 8 decks
7 Belisarius Cawl 5 decks
8 Shorikai, Genesis Engine 5 decks
9 Tony Stark // The Invincible Iron Man 5 decks
10 Urtet, Remnant of Memnarch 4 decks

The "good card" funnel

283 brought · 134 players

Brought to game

283

Ever drawn

Reached battlefield

Still on board at game end

Once cast, 90% of this card is still on the battlefield at game end. This reflects how often it survives removal, not just whether it's a permanent.

≥ -3.7pp

Players who cast this card win 32% of the time (n=19) , vs 24% when it never left the library (n=168).

When players drew this card but left it in hand, they won 16% (n=19).

Read this as correlation, not as the card's contribution. Casting a card means you lived long enough to cast it, so this gap widens with mana value across every card we track.

Observed gap +8.1pp; 95% confidence interval -3.7pp to +19.9pp. Correlational, not causal: powerful payoffs also get cast more often in games you are already winning.

First-cast turn

n=30

10%

17%

20%

33%

T6-9

10%

T10+

Median 5.0 P25 4 · P75 9 · max 11

On curve 37% (5 / 30 cast on T4) Cast same turn as drawn 21%

Frequently Asked

Why isn't there more data on this card?

Playgroup Live collects per-card gameplay data from real Commander games. Play counts appear once a card reaches 100 tracked games, and the full charts need a sample of at least 25 observed games that is not dominated by a single pilot. Until this card clears those bars you're seeing only the basic counts. Stats refresh nightly.

How is Playgroup Live card data collected?

Players using Playgroup Live import their decklists before a game and log card actions as they play. Each cast, zone change, and resolution is recorded as a real game event. Stats on this site are computed from those events, not from decklist scrapes or theorycrafting. Playgroup has recorded 750,000+ Commander games overall, and this card-level play data comes from the Playgroup Live seats playing virtual cards, a subset of that corpus.