Changeling Hero

Creature - Shapeshifter 4/4, 4W (5)
Changeling (This card is every creature type at all times.)
Champion a creature (When this enters the battlefield, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)¹
Illus. Jeff Miracola

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Lorwyn (Uncommon)