Elemental Gemstone

When an artifact leaves play, draw a card.
{r},{t}: Destroy target artifact. Take 2 damage.
{b},{t}: Sacrifice an artifact. Return target creature
from your graveyard to your hand.
{g},{t}: Destroy target artifact. Discard a card.
{u},{t}: Return target artifact you control to your
hand. Copy target instant or sorcery spell.
{w},{t}: Exile target artifact. The artifacts owner
gains life equal to its converted mana cost.