A-to-Z Energy Load (MZTM-EN024) [Maze of the Master]

When your opponent activates a card or effect: Draw cards equal to the number of Level 8 or higher LIGHT Machine Fusion Monsters you control. During your Standby Phase: You can banish this card from your GY; shuffle up to 6 of your banished LIGHT Machine monsters into the Deck, including a Union monster. You can only use each effect of "A-to-Z Energy Load" once per turn.