Mesmerizing Witch, Fianna

:[Legion 20000]"Witch of Reality, Femme"(If your opponent's vanguard is grade 3 or greater, this unit may return four cards from your drop zone into your deck once, search your deck for the specified card, and Legion) : 2 If this unit is [Legion], choose up to two of your opponent's with a rear-guard, your opponent reveals ten cards from the top of his or her deck, chooses grade 0 cards equal to the number of chosen from among them, calls those cards to those separate , and shuffles his or her deck. :[Choose a rear-guard with the same card name as a unit on your , and retire it] If the number of grade 0 rear-guards your opponent has is two or more, draw two cards. This ability cannot be used for the rest of that turn.