Cheapest priced copy (Commander 2021): $0.79 at Card Kingdom, near mint, their price list as of .
Reinterpret 
Instant · Rare · Commander 2021 · #73
Counter target spell. You may cast a spell with equal or lesser mana value from your hand without paying its mana cost.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.79 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2021 | 73 | Rare | $0.99 | — |
| Commander 2021 | 400 | Rare | $0.79 | — |
5 rulings from Wizards of the Coast
- 16 April 2021If you target a spell that can’t be countered, like Heated Debate, you won’t counter the spell, but you will get to cast a spell with an equal or lesser mana value.
- 16 April 2021If the spell you cast has {X} in its mana cost, you must choose 0 as the value of X.
- 16 April 2021This can be used to cast either face of a modal double-faced card, but only if the face you are casting has an equal or lesser mana value than the target spell.
- 16 April 2021If you cast a spell “without paying its mana cost,” you can’t pay any alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, you must pay those.
- 16 April 2021If a spell with {X} in its mana cost is countered this way, {X} is the value chosen as the spell was cast.