You can Special Summon this card (from your hand) by banishing 1 Level/Rank 8 monster from your GY. You can target 1 Level/Rank 8 Ritual, Fusion, Synchro, or Xyz Monster in your GY; shuffle it into the Deck, then apply the following effect depending on the returned monster's card type.
●Ritual/Fusion: Draw 1 card.
●Synchro/Xyz: This card gains 1000 ATK.
You can only use this effect of "Yakusa, Lord of the Eight Thunders" once per turn.