Slifer the Sky Dragon is built around Slifer the Sky Dragon, whose power grows depending on the number of cards in the controller’s hand. The deck uses token-generating effects to quickly gather the three tributes to summon Slifer. The deck includes the all-new card Thunderforce Attack, a Spell card that can destroy all of an opponent’s face-up monsters at once. Activating Thunderforce Attack during the player’s own Main Phase allows them to draw a card for each monster destroyed.