You can discard this card; add to your hand, 1 of your Thunder Dragon cards that is banished or in your GY, except Thunder Dragonroar . If this card is banished, or sent from the field to the GY: You can Special Summon 1 Thunder Dragon monster from your Deck in Defense Position, but return it to the hand during the End Phase. You can only use 1 Thunder Dragonroar effect per turn, and only once that turn.