Cheapest priced copy (Onslaught): $0.35 at Card Kingdom, near mint, their price list as of .
Venomspout Brackus 
Creature — Beast · 5/5 · Uncommon · The List · #ONS-295
{1}{G}, {T}: This creature deals 5 damage to target attacking or blocking creature with flying.
Morph {3}{G}{G} (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