Star-vader, Bravefang

:Forerunner (When a unit of the same clan rides this unit, you may call this unit to ) :[Put this unit into your soul] When an attack hits a vanguard during the battle this unit boosted ([Boost]), if your vanguard is [Legion], you may pay the cost. If you do, choose up to two of your opponent's locked cards, and those cards cannot be unlocked during his or her next end phase.