Shaman 0f the swarm

Undergrowth—When Shaman of the Swarm enters the battlefield, destroy target creature, then return a creature card from
your graveyard to the battlefield.
{b/g}{t}: Exile a creature card from your graveyard: Create a 1/1 insect creature token.
{b}{b}{g}{g}: Sacrifice a creature: Draw a card,
then you gain 2 life.