Cheapest priced copy (Commander 2018): $0.35 at Card Kingdom, near mint, their price list as of .
Kruphix's Insight 
Sorcery · Common · Journey into Nyx · #129
Reveal the top six cards of your library. Put up to three enchantment cards from among them into your hand and the rest of the revealed cards into your graveyard.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2018 | 155 | Common | $0.35 | — |
| Journey into Nyx | 129 | Common | $0.35 | $1.99 |