This rule means that the vast majority of decks are going to be a little like "Highlander" decks - For the most part, you're only playing 1 copy of each card in the maindeck, since there's a cost for playing multiple copies of the same card
It deals 60 HP damage per Prize Card your opponent has taken, so you can sit back and wait for them to think theyre ahead before striking
When this Siege enters, look at target opponent's hand
When this card is Special Summoned: You can any number of destroy Spells/Traps on the field, then this card loses 500 ATK for opponent's card destroyed, but gains 500 for each of your cards destroyed
This card, however, wasnt awarded to the Secret Super Battle championbut instead to the players who finished in first place in each of the nine regional Challenge Road tournaments which served as qualifiers
The Strand Magazine, February 1903, page 235