Cheapest priced copy (Nemesis): $0.49 at Card Kingdom, near mint, their price list as of .
Eye of Yawgmoth 
Artifact · Rare · Nemesis · #129
{3}, {T}, Sacrifice a creature: Reveal a number of cards from the top of your library equal to the sacrificed creature's power. Put one into your hand and exile the rest.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper