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Promise of Loyalty

· Sorcery · Marvel Super Heroes Commander (MSC)

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Times Brought

1431

Decks Running

736

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

Promise of Loyalty

Sorcery

Each player puts a vow counter on a creature they control and sacrifices the rest. Each of those creatures can't attack you or planeswalkers you control for as long as it has a vow counter on it.

Marvel Super Heroes Commander (MSC) · Rare · Illustrated by Sveta Pikul

Final zone distribution

294 instances

2.7%

Library

3.4%

Battlefield

45.2%

Graveyard

6.8%

Exile

Commanders that played this card

in tracked games

The "good card" funnel

1431 brought · 659 players

Brought to game

1431

Ever drawn

283

Reached battlefield

136

Still on board at game end

≥ -4.6pp

Players who cast this card win 26% of the time (n=104) , vs 25% when it never left the library (n=798).

When players drew this card but left it in hand, they won 28% (n=105).

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 +0.5pp; 95% confidence interval -4.6pp to +5.6pp. Correlational, not causal: powerful payoffs also get cast more often in games you are already winning.

First-cast turn

n=136

13%

63%

T6-9

17%

T10+

Median 7.0 P25 6 · P75 9 · max 15

On curve 21% (17 / 136 cast on T5) Cast same turn as drawn 29%

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 740,000+ Commander games overall, and this card-level play data comes from the Playgroup Live seats playing virtual cards, a subset of that corpus.