Unrivaled Star-vader, Radon

Drop:If your soul has one or less cards, this cost is reduced by 1. At the beginning of your battle phase, 1, and call this card to a in the same column as your rear-guard with "Star-vader" in its card name. :When this unit attacks, until end of that battle, when your opponent would call cards from hand to , they must call two or more at the same time. At the end of that battle, bind this unit. (This effect is mandatory)