Super Heavy God Gravion Episode 13 English Dubbed Episode Title:White Steel Fang.Episode Description:The Zeravire in deep space receive an order to destroy all human life, by adapting to whatever is required to overcome the obstacle that would stop them. The Zeravire are evolving faster than expected. The firepower is greater than is needed to destroy humanity, they are evolving especially to overcome Gravion. A new weapon is being developed by the air force which is attracting attention...