Cheapest priced copy (Starter Commander Decks): $0.49 at Card Kingdom, near mint, their price list as of .
Scythe Specter 
Creature — Specter · 4/4 · Rare · Commander 2011 · #97
Flying
Whenever this creature deals combat damage to a player, each opponent discards a card. Each player who discarded a card with the greatest mana value among cards discarded this way loses life equal to that mana value.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Anthology Volume II | 74 | Rare | $0.59 | — |
| Commander 2011 | 97 | Rare | $0.79 | — |
| Starter Commander Decks | 105 | Rare | $0.49 | — |
4 rulings from Wizards of the Coast
- 22 September 2011Each opponent in turn order chooses a card to discard without revealing it, then all the chosen cards are discarded simultaneously. No one sees what the other players are discarding before deciding which card to discard.
- 22 September 2011If Scythe Specter deals combat damage to multiple players simultaneously (perhaps because some of the combat damage was redirected to another player), its ability will trigger for each of those players.
- 22 September 2011If there are multiple cards tied for the highest mana value, each player who discarded one of those cards will lose life equal to that mana value.
- 22 September 2011In a Two-Headed Giant game, each member of the opposing team will be able to see the other's hand before deciding what to discard. If each member discards a card with the same mana value, each player will lose that much life, resulting in the team losing life equal to twice that mana value.