Up for sale is the library-ordering Ancestral Knowledge, a rare card from the Weatherlight expansion of Magic: the Gathering. This is the original, white-bordered, English version.
Ancestral Knowledge: Enchantment with Cumulative Upkeep 1; when Ancestral Knowledge comes into play, look at the top ten cards of your library, then remove any number of them from the game and put the rest back on top of your library in any order; when Ancestral Knowledge leaves play, shuffle your library; casting cost 1U.
These cards are in at least Very Fine condition, with most being in Near Mint or better condition.
