Cheapest priced copy (Onslaught): $0.35 at Card Kingdom, near mint, their price list as of .
Mistform Shrieker 
Creature — Illusion · 3/3 · Uncommon · Onslaught · #96
Flying
{1}: This creature becomes the creature type of your choice until end of turn.
Morph {3}{U}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper