Cheapest priced copy (Strixhaven: School of Mages): $3.49 at Card Kingdom, near mint, their price list as of .
Dragon's Approach 
Sorcery · Common · Strixhaven: School of Mages · #97
Dragon's Approach deals 3 damage to each opponent. You may exile this spell and four cards named Dragon's Approach from your graveyard. If you do, search your library for a Dragon creature card, put it onto the battlefield, then shuffle.
A deck can have any number of cards named Dragon's Approach.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $3.49 to $34.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mystery Booster 2 | 246 | Common | — | $34.99 |
| The List | STX-97 | Common | $4.49 | — |
| Strixhaven: School of Mages | 97 | Common | $3.49 | $3.99 |
2 rulings from Wizards of the Coast
- 16 April 2021In most cases, you'll need to exile five cards named Dragon's Approach (the resolving one from the stack plus four more from your graveyard) to search for a Dragon card. However, if Dragon's Approach is a copy, you can still exile it along with four cards named Dragon's Approach from your graveyard to search for a Dragon card. The exiled copy will then cease to exist.
- 16 April 2021The last ability of Dragon's Approach lets you ignore the "four-of" rule. It doesn't let you ignore format legality. For example, during a Strixhaven Limited event, you can't add Dragon's Approach from your personal collection.