Chromasäule

{g}, Sacrifice a noncreature token: add {w}{w}.
{w}, Return a creature you control to its owners
hand: add {u}{u}.
{u}, Sacrifice a creature: add {b}{b}.
{b}, Discard a card: add {r}{r}.
{r}, Exile a card from your hand: add {g}{g}.
Activate each ability only once each turn and only
any time you could cast a sorcery.