Seeker, Light Saver Dragon

:[Legion 20000]"Seeker, Light Blaze Dragon"(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-cards with "Seeker" in its card name] If this unit is [Legion], choose up to three of your units, and those units get +5000 until end of turn. This ability cannot be used for the rest of that turn. :[Choose a card from your hand, and discard it] When this unit's attack hits a vanguard, you may pay the cost. If you do so, search your deck for up to one card with "Seeker" in its card name, call it to , and shuffle your deck.