Block Dragon [MP17-EN085] Ultra Rare Machine then target 1 monster your

then target 1 monster your opponent controls

If the selected card is destroyed

When an opponent's monster declares a direct attack: You can change that opponent's monster to face-down Defense Position

If this card is Normal or Special Summoned: You can target 1 "Hydrogeddon"

Block Dragon [MP17-EN085] Ultra Rare Machine then target 1 monster yourSet: 2017 Mega Tins Mega Pack Card type: Effect Monster Rarity: Ultra Rare Attack: 2500 Defense: 3000 Cannot be Normal Summoned Set. Must be Special Summoned (from your hand or Graveyard) by banishing 3 EARTH monsters from your hand and or Graveyard, and cannot be Special Summoned by other ways. Rock Type monsters you control cannot be destroyed, except by battle. If this card is sent from the field to the Graveyard: You can add up to 3 Rock Type