Midas, Illustrious Monarch

Whenever Midas, Illustrious Monarch blocks or becomes blocked by a creature, you may exile
that creature. If you do, 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."
Midas gets +1/+1 for each artifact token named
Gold you control. If Midas's power is five or
greater, it gains vigilance.
Earth provides enough to satisfy every man's needs,
but not every man's greed.