Covert Demonic Dragon, Magatsu Storm "Reverse" (D-VS04/SP04EN)

[AUTO]:When this unit is placed on (RC) by the ability of your vanguard with "Magatsu" in its card name, lock all of your rear-guards without "Magatsu" in their card names, and all of your units get [Power] +5000 until end of turn. If your opponent's vanguard is grade 3 or greater, [COST][Counter-Blast 1 & discard two cards from your hand], and you perform drive checks for the battles this unit attacked until end of turn. [AUTO]:When this unit is retired from (RC) during your opponent's turn, [COST][Soul-Blast 1], put this card into your hand, your opponent chooses a card from their hand, and discards it.