Cheapest priced copy (Modern Horizons): $2.99 at Card Kingdom, near mint, their price list as of .
Archmage's Charm 
Instant · Rare · Modern Horizons 1 Timeshifts · #7
Choose one —
• Counter target spell.
• Target player draws two cards.
• Gain control of target nonland permanent with mana value 1 or less.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $2.99 to $6.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 1 Timeshifts | 7 | Rare | — | $5.99 |
| Modern Horizons | 40 | Rare | $2.99 | $4.49 |
| Breaking News | 8 | Rare | $2.99 | $3.99 |
| Store Championships | 2 | Rare | — | $4.49 |
| Secret Lair Drop | 2490 | Rare | $5.99 | $6.49 |
2 rulings from Wizards of the Coast
- 14 June 2019If a creature on the battlefield has {X} in its mana cost, X is considered to be 0.
- 12 April 2024The mana value of a token that isn't a copy of another object is 0. A token that is a copy of another object has the same mana cost as that object.