It is for Subterra Bakugan. If this Attack is not blocked, it deals extra Damage. If you win a Strength Contest, it deals extra Damage. If you win a Willpower Contest, it deals extra Damage. You can only play this Attack on your first action. It can only be used at Close Range. It is a Combo Start.
If used with the Momentum Gate, its damage can exceed 1000 with the requirements completed.