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That's because, when you go second, you don't have much time to put interactions in play, so you need something to stop or make your opponent's combo weaker

Oh, certainly, you can prey on less experienced players and new players

It obfuscates information unless it is placed in front of a black or equally as dark background, and in my opinion sacrifices too much opportunity for brand identity for the sake of cleanness

Because "Symphonic Warrior Guitaar" have Pendulum Scale of 7, it can be combined with the Supreme King Pendulum engine to fill the missing scale (with "Supreme King Gate Zero"), allowing the deck to Pendulum Summon more reliably

They are the "Ultra Beasts"