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* This card made cards like "[[Lightning Vortex]]", "[[Abyss Soldier]]", "[[Swap Frog]]", "[[Tribute to the Doomed]]", and others whose effects required that a card be discarded as a cost, practically costless.
* "[[Sinister Serpent]]" is featured in the artwork of "[[Snake Whistle]]" and the Japanese "[[Exchange]]".
