Cheapest priced copy (Lorwyn): $0.69 at Card Kingdom, near mint, their price list as of .
Changeling Berserker 
Creature — Shapeshifter · 5/3 · Uncommon · Lorwyn · #160
Changeling (This card is every creature type.)
Haste
Champion a creature (When this enters, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper