This mechanic quickly became a staple, especially in green and black decks, where it provided a reliable means of protecting key creatures from destruction
(2024-06-07) The copies are created on the stack, so they're not "cast" or "activated." Creating the copies won't cause abilities that trigger when a player casts a spell or activates an ability to trigger
Enter Black Kyurem EX and yes, it is the one from Boundaries Crossed: The strength in this deck comes from having a 300 HP monster capable of landing 1HKOs against any EX in the game (not counting Eviolite or other HP-boosting cards)
The real hidden value here lies in the deck list itself

Card Set(s) -PARAMOUNT WAR- [OP02] CARD VIEW OP02-107 | C | CHARACTER Doberman Attribute Strike Block icon 1 Card Set(s) -PARAMOUNT WAR- [OP02] CARD VIEW OP02-108 | C | CHARACTER Donquixote Rosinante Attribute Special Block icon 1 Type Navy/Donquixote Pirates Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) Card Set(s) -PARAMOUNT WAR- [OP02] CARD VIEW OP02-108 | C | CHARACTER Donquixote Rosinante Attribute Special Block icon 1 Type Navy/Donquixote Pirates Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) Card Set(s) -PARAMOUNT WAR- [OP02] CARD VIEW OP02-109 | C | CHARACTER Jaguar.D.Saul Attribute Strike Block icon 1 Card Set(s) -PARAMOUNT WAR- [OP02] CARD VIEW OP02-110 | R | CHARACTER Hina Attribute Special Block icon 1 Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) [On Block] Select up to 1 of your opponent's Characters with a cost of 6 or less
