Up for sale is the boostable Battlefield Scrounger, a common card from the Judgment expansion of Magic: the Gathering. This is the Foil, black-bordered, English version.
Battlefield Scrounger: 3/3 Green Creature (Centaur); Threshold - put three cards from your graveyard on the bottom of your library to have Battlefield Scrounger get +3/+3 until end of turn; play this Ability only once each turn, and only if seven or more cards are in your graveyard; casting cost 3GG.
These cards are all in at least Very Fine condition, with most being in unplayed, Mint/Near Mint condition.
