Rare · Star Trek Commander and 12 other printings

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.

Add to a deck Build a deck around it Open on Scryfall ↗

How it plays

What it wants, and what it gives

Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.

It rewards

rewardsPlaneswalkersKeyword page →Planeswalkers, and cards that protect and accelerate them.338 cards enable Planeswalkers

It enables

enablesSpellslingerKeyword page →Instants and sorceries, and cards that trigger when you cast them.1,018 cards reward Spellslinger

Works well with

Cards that click with it

rewardsPlaneswalkersmeetsenablesPlaneswalkers338 cards enable it

Price

Lowest printing, from Scryfall.

US market$0.26

EU market$0.17

Foil, lowest—

Price history: Star Trek Commander #426

Show as a table

Date	Non-foil
12 Nov 2026	$0.92
11 Nov 2026	$0.92

Formats

CommanderLegalPioneer—Modern—LegacyLegalVintageLegalOathbreakerLegal

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