Cheapest priced copy (Theros Beyond Death): $0.49 at Card Kingdom, near mint, their price list as of .
Thassa's Intervention 
Instant · Rare · Theros Beyond Death · #307
Choose one —
• Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order.
• Counter target spell unless its controller pays twice {X}.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Theros Beyond Death Promos | 72p | Rare | $1.79 | $0.79 |
| Theros Beyond Death Promos | 72s | Rare | — | $1.29 |
| Theros Beyond Death | 72 | Rare | $0.49 | $0.99 |
| Theros Beyond Death | 307 | Rare | $1.29 | $2.49 |