Thunder Dragonhawk [MP19-EN168] Prismatic Secret Rare

You can discard this card; Special Summon 1 of your "Thunder Dragon" monsters that is banished or in your GY, except "Thunder Dragonhawk". If this card is banished, or sent from the field to the GY: You can shuffle any number of cards from your hand into the Deck, then draw the same number of cards. You can only use 1 "Thunder Dragonhawk" effect per turn, and only once that turn.