Bag of Infinite Kobolds

When this bag is opened, 1d4 Kobold Warriors will emerge. Another 1d4 Kobold Warriors will emerge every 30 seconds that the bag is open. These kobolds will not be instantly aggressive, but neither will they follow orders unless persuaded to do so. For every 10 minutes that the bag is open, roll a d20. On a 20, the bag will overflow with gold (10,000-50,000). On a 1, an adult red dragon will emerge from the bag, destroying it.