Puns are hard, and so is YGO as they ask you to do math.
BLVO-JP080 Ichiji Houkoteishiki / Stationary One-o’-Clock Linear Accelerator
Normal Trap Card
You can only activate 1 card with this card’s name per turn.
(1) During the Battle Phase: Declare a number from 1 to 6; choose 1 Effect Monster your opponent controls, and if the chosen monster’s Level x the declared number + the number of cards your opponent controls equals the number of cards in your GY, send cards from the top of your Deck to the GY up to the number you declared, and if you do, shuffle cards your opponent controls into the Deck up to the number of cards sent to the GY by this effect. If not, you lose LP equal to the declared number x 500.