Stealth Beast, Kuroko

:Forerunner (When a unit of the same clan rides this unit, you may call this unit to ) : 1 When an attack hits a vanguard during the battle this unit boosted([Boost]), if you have a Nubatama vanguard, you may pay the cost. If you do, choose up to two cards from your opponent's bind zone, and put them into his or her drop zone.