Mecha Instructor

:Charge (During the turn this unit is placed on due to an effect, you may have it become charging. If you do, put it on the bottom of your deck at the end of its battle) :[Choose a card from your hand, and put it into your soul] When this unit is put into your deck from , you may pay the cost. If you do, choose one of your rear-guards, bind it face up, and call that card to an open .