Delg the Dark Monarch [STBL-EN037] Super Rare Spell Ruler then put that card on

then put that card on the top or the bottom of their Deck

and only once that turn

change all monsters on your opponent's side of the field to face-down Defense Position

If you Normal Summon it this way

Delg the Dark Monarch [STBL-EN037] Super Rare Spell Ruler then put that card onSet: Starstrike Blast Card type: Effect Monster Rarity: Super Rare Attack: 2400 Defense: 1000 When this card is Normal or Special Summoned: You can target up to 2 cards in your opponent's Graveyard, remove them from play. Then send the same number of cards from the top of their Deck to the Graveyard. During the turn it is Normal or Special Summoned, this card cannot attack.