Soul of Mimzy

Whenever Soul of Mimzy enters the battlefield or attacks, you may put a land card from a graveyard onto the battlefield tapped under your control.

{g},Discard a land card : You gain 3 life.
{1}{r},Discard a land card: Draw a card.
{2}{b},Discard a land card: Soul of Mimzy gains indestructible until end of turn. Tap it.