Cheapest priced copy (The List): $0.49 at Card Kingdom, near mint, their price list as of .
Bond of Discipline 
Sorcery · Uncommon · War of the Spark · #6
Tap all creatures your opponents control. Creatures you control gain lifelink until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The List | WAR-6 | Uncommon | $0.49 | — |
| War of the Spark | 6 | Uncommon | $0.49 | $2.99 |
One ruling from Wizards of the Coast
- 3 May 2019You can cast Bond of Discipline even if your opponents control no creatures or you control no creatures. The creatures that are on the battlefield will be affected as appropriate.