Cheapest priced copy (The List): $19.99 at Card Kingdom, near mint, their price list as of .
Pact of Negation 
Instant · Rare · Future Sight · #42
Counter target spell.
At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
8 printings · $19.99 to $299.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Masters 25 | 68 | Rare | $21.99 | $79.99 |
| Future Sight | 42 | Rare | $24.99 | $299.99 |
| Tales of Middle-earth Commander | 523 | Rare | $84.99 | $199.99Out of stock |
| Mystery Booster 2 | 169 | Rare | $21.99 | $139.99 |
| Modern Masters | 56 | Rare | $23.99 | $89.99 |
| Amonkhet Invocations | 16 | Special | — | $199.99 |
| The List | A25-68 | Rare | $19.99 | — |
| Time Spiral Remastered | 77 | Rare | $21.99 | $79.99 |
3 rulings from Wizards of the Coast
- 7 June 2013Although originally printed with a characteristic-defining ability that defined its color, this card now has a color indicator. This color indicator can't be affected by text-changing effects (such as the one created by Crystal Spray), although color-changing effects can still overwrite it.
- 19 March 2021If Pact of Negation is countered or otherwise doesn't resolve (perhaps because its target became illegal), the delayed triggered ability that threatens you with a game loss won't trigger at the beginning of your next upkeep.
- 19 March 2021If Pact of Negation resolves with a legal target but fails to counter that spell (most likely because that spell can't be countered), the delayed triggered ability will still trigger at the beginning of your next upkeep and you will have to pay. Or else.