Cheapest priced copy (Invasion): $0.35 at Card Kingdom, near mint, their price list as of .
Crown of Flames 
Enchantment — Aura · Common · Invasion · #142
Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.
{R}: Return this Aura to its owner's hand.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern