Cheapest priced copy (Alliances): $10.99 at Card Kingdom, near mint, their price list as of .
Diminishing Returns 
Sorcery · Rare · Classic Sixth Edition · #65
Each player shuffles their hand and graveyard into their library. You exile the top ten cards of your library. Then each player draws up to seven cards.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $10.99 to $19.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Classic Sixth Edition | 65 | Rare | $11.99 | — |
| Alliances | 26 | Rare | $10.99 | — |
| Eternal Masters | 46 | Rare | $10.99 | $19.99 |
3 rulings from Wizards of the Coast
- 8 June 2016Each player chooses to draw any number of cards from zero to seven. First the player whose turn it is chooses how many cards to draw, then draws those cards, then each other player in turn order does the same.
- 8 June 2016The exiled cards are exiled face up. You’ll see them before you choose how many cards to draw.
- 8 June 2016Diminishing Returns won’t be put into your graveyard until after it’s finished resolving, which means it won’t be shuffled into your library as part of its own effect.