Omnidom

Creatures you control have Changeling.
Flying
{b/r}: Omnidom deals 2 damage to target creature.
{1}{g}{t}: Search your library for a land and put
it onto the battlefield. Then shuffle your library.
{2}{r/w}{u}: Gain control of target creature until end
of turn. It gains Haste and Lifelink until end of
turn.
{4}{b}: Return target creature in a graveyard to the battlefield under your control.