Tomi, Lady of Fortune

Lifelink
Whenever you sacrifice an articact untap this card.
{1}, {t}: Put a colorless artifact token named Gold onto the battlefield. It has "Sacrifice this artifact: Add one mana of any color to your mana pool."
{x}, {t}: Until end of turn, up to X artifcats you control get "{t}: Add one mana of any color to your mana pool."