Dragon Dancer, Bernadette

Thunderstrike 2 (This ability is active when your opponent's bind zone has two or more cards): 1When this unit boosts ([Boost]), you may pay the cost. If you do, until end of that battle, the boosted ([Boost]) unit gets +3000, and "/: 1 When this unit's attack hits a vanguard, you may pay the cost. If you do, your opponent chooses one of his or her rear-guards, retires it, and binds that card face up.".