Cheapest priced copy (Commander Legends): $0.35 at Card Kingdom, near mint, their price list as of .
Sparktongue Dragon 
Creature — Dragon · 3/3 · Common · Commander Legends · #202
Flying
When this creature enters, you may pay {2}{R}. When you do, it deals 3 damage to any target.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
6 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends | 202 | Common | $0.35 | $0.49 |
| Game Night 2019 | 43 | Common | $0.35 | — |
| Jumpstart 2022 | 604 | Common | $0.35 | — |
| Foundations Jumpstart | 600 | Common | $0.35 | — |
| Core Set 2019 | 159 | Common | $0.35 | $0.49 |
| The List | M19-159 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 10 November 2020You don't choose a target for Sparktongue Dragon's last ability at the time it triggers. Rather, a second "reflexive" ability triggers when you pay {2}{R} this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.