Mines of Moria

{t}: Create a colorless artifact token named Gold onto the battlefield. It has "Sacrifice this artifact: add one mana of any color to your mana pool."
At the beginning of your upkeep or whenever Mines of Moria becomes tapped, put a delve counter on it.
At the beginning of your upkeep, if there are
six or more delve counters on Mines of Moria, sacrifice it. Target opponent puts a 5/4 black and red Balrog creature token with trample and