Cheapest priced copy (The List): $0.35 at Card Kingdom, near mint, their price list as of .
Blood Frenzy 
Instant · Common · The List · #TMP-164
Cast this spell only before the combat damage step.
Target attacking or blocking creature gets +4/+0 until end of turn. Destroy that creature at the beginning of the next end step.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern