Easgal Liberator

/Hand:[Bind this card face up] Choose one of your units or locked cards, unlock it, and it gets +2000 until end of turn. :[Put this unit on the bottom of your deck] At the beginning of your ride phase, if you have a vanguard with "Liberator" in its card name, you may pay the cost. If you do, until end of turn, you may pay the cost for your next with " 1‐card with "Liberator" in its card name".