Thunder Dragonmatrix

“(Quick Effect): You can discard this card, then target 1 Thunder monster you control; it gains 500 ATK. If this card is banished, or sent from the field to the GY: You can add 1 "Thunder Dragonmatrix" from your Deck to your hand. You can only use 1 "Thunder Dragonmatrix" effect per turn, and only once that turn.”