Cheapest priced copy (Eldritch Moon): $0.35 at Card Kingdom, near mint, their price list as of .
Shreds of Sanity 
Sorcery · Uncommon · Eldritch Moon · #141
Return up to one target instant card and up to one target sorcery card from your graveyard to your hand, then discard a card. Exile Shreds of Sanity.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eldritch Moon | 141 | Uncommon | $0.35 | $1.49 |
3 rulings from Wizards of the Coast
- 13 July 2016If you target two cards and one of the targeted cards becomes illegal, you’ll still return the other one, discard a card, and exile Shreds of Sanity. If each targeted card becomes illegal, Shreds of Sanity doesn’t resolve and you won’t discard a card or exile Shreds of Sanity.
- 13 July 2016You may discard one of the cards you return to your hand. If you have no other cards in hand, you must discard one of the cards you return to your hand.
- 13 July 2016You may cast Shreds of Sanity with just one target. You may also cast it without any targets if you just want to discard a card.