Cheapest priced copy (Foundations): $0.35 at Card Kingdom, near mint, their price list as of .
Fake Your Own Death 
Instant · Common · Foundations · #174
Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield tapped under its owner's control and you create a Treasure token." (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
4 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations | 174 | Common | $0.35 | $0.79 |
| Foundations Jumpstart | 440 | Common | $0.35 | — |
| Outlaws of Thunder Junction | 87 | Common | $0.39 | $0.49 |
| Streets of New Capenna | 79 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 29 April 2022The Treasure token is created by the creature's controller, who may be different from Fake Your Own Death's controller and may be different from the creature's owner.
- 29 April 2022If the target creature is a token, the ability still triggers when it dies. Its controller won't return the token to the battlefield, but they will creature a Treasure token.