Cheapest priced copy (Portal Three Kingdoms): $2.99 at Card Kingdom, near mint, their price list as of .
Sage's Knowledge 
Sorcery · Common · Portal Three Kingdoms · #52
Return target sorcery card from your graveyard to your hand.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Portal Three Kingdoms | 52 | Common | $2.99 | — |