Dimensional Robo, Daiball

:When this unit is placed on or , choose up to one card from your hand, reveal it, and if neither that card nor your vanguard is a grade 3 card with "Dimensional Robo" in its card name, this unit gets -5000 until end of turn. :If you have a grade 4 vanguard with "Dimensional Robo" in its card name, this unit and all of your grade 3 rear-guards get +5000.