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Several players in the r/CompetitiveEDH thread on Yshtola noted these synergies and their potential in the format

I think there is a bias surrounding any cards perceived to be OP that they are the reason the result went that way when loads of "weaker" cards would have done the same thing or even completely different cards used earlier in the game already decided it

Also summoned Marauding Captain in hand, then The Dark - Hex-Sealed Fusion, like a combo that sent Cyber Twin Dragon to his GY along with Special Summoned Cyber Dragon and later Normal Summoned The Light - Hex-Sealed Fusion

If this card is sent to the Graveyard: You can target 1 other "Ghostrick" card in your Graveyard