- Order: Saurischia
- Suborder: Wyvern Feet
- Infraorder: Heavy Shell Wyvern
- Superfamily: Armor Wyvern
- Family: Armor Wyvern
Like its grey counterpart, the Black Gravios is a highly specialized mineral eater, particularly Firecell Stones. Because of this it really has no competition in its niche. However, they will occasionally feed on meat in order to gain protein. Its only known natural predator is Akantor.
Black Gravios skin has allowed them to withstand the incredible heat of the magma they swim in. A Black Gravios thick shell is so tough, even white sharpness weapons cannot pierce it, especially around the legs and neck. Their tail is thick and club-like, easily knocking lesser creatures and hunters out of the beast's way. Black Gravios retains the creatures shovel-like face, used to assist the creature in consuming large quantities of volcanic ores. Black Gravios have dark red pores all over their bodies that will vent a red hot gas especially after using its lava beam repeatedly. This is because the Black Gravios has more heat inside its body compared to a normal Gravios. From this it has to constantly breath fiery beams and release hot flaming gas in order to stay cool. Black Gravios can retreat into the lava, even if its underbelly shell has been broken.
Far more aggressive than its grey counterpart, the Black Gravios will attack just about anything in order to survive, especially Akantor.