Omashu, the Great City

{t}: Add {1} to your mana pool.
{1}, {t}: Discard a card: Gain 3 life.
{1}, {t}: Pay 1 life: create a 0/1 white Goat
token.
{1}, {t}: Sacrifice a creature: Return target
artifact from your graveyard to your hand.
{1}, {t}: Sacrifice an artifact: Draw a card.