The Wild Blast is a feature unique to the Zoids: Wild franchise.
When a Zoid Hunter forms a strong bond with their partner Zoid, the Zoid can bestow a "Zoid Key" onto them.
By using the Zoid Key, the rider can unleash a powerful hidden attack known as a "Wild Blast". The Wild Blast is an "Instinct Release", which sees the Zoid and pilot glow in flames, with the left eye of both covered in blue fire.
The Wild Blast puts immense strain on the Zoid and the rider, so it cannot be sustained indefinitely, but depending on the bond, the amount of effort required to remain in the mode diminishes significantly.