Marc Thompson (English) Roman is the leader of the Dark Signers
Either way, it's creepy
Though this list is looking more at the flavour of the cards, it also fits really nicely with what the card does: you gain control of a creature in an opponent's hand, give it haste so it can hit its owner, and then callously sacrifice it at the end of the turn
Rare cards can also get a flair boost, but its worth holding off on using flair for these, as the trade function could make alternate artwork highly valuable in the future
Its great in decks that want a burst of card draw, like The Locust God and Niv-Mizzet, Parun, or simply any red deck interested in ditching a Mountain for some mana flood insurance
So you're up against that, first you play Hex Maniac, and then you play Lugia-EX with Double-Colorless Energy, and you use the Lugia-EX to knock out the Keldeo-EX