Cheapest priced copy (Archenemy): $0.35 at Card Kingdom, near mint, their price list as of .
Makeshift Mannequin 
Instant · Uncommon · Lorwyn · #124
Return target creature card from your graveyard to the battlefield with a mannequin counter on it. For as long as that creature has a mannequin counter on it, it has "When this creature becomes the target of a spell or ability, sacrifice it."
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper