Cheapest priced copy (Secrets of Strixhaven): $0.35 at Card Kingdom, near mint, their price list as of .
Muse's Encouragement 
Instant · Common · Secrets of Strixhaven · #61
Create a 3/3 blue and red Elemental creature token with flying.
Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
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1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secrets of Strixhaven | 61 | Common | $0.35 | $0.49 |