These guys live in volcanic areas. They tend to eat the lava around them. And make a den inside the volcano. If the volcano they live is near a small village. The village tends to offer presents to them so they will keep the lava flow to a minimum. Sometimes they will go into a deep slumber. If woken up. They can get quiet grumpy on the nearby village. When charging there lava like blast, a different color smoke with escape from there all black mouth. They usually bleed a deep blue or purple colored fluid. That can be used in medical purposes. Some may take a liking to a certain mortal and grow a bond with them. This can allow them to telepathically speak with the mortal. There color palette can range from different color of greys, reds, yellows, and orange. But they must be dark for they live in volcanic areas.