Creatures that tap opposing threats are often among the strongest creatures in the format because they play offensively and defensively against your opponents most threatening creatures
There are also two other Pokmon Centers in the greater Kant region Pokmon Center Tokyo Bay (Chiba Prefecture) and Pokmon Center Yokohama (Kanagawa Prefecture)
It is evident after watching him play the deck that we play the deck very differently, as I am much more apt to mulligan aggressively and look for powerful openings while he is happier to sit back and play a more reactive game
Both are Level 5+ DARKs, which add synergy with the Resonator package, but Ebon in particular is both Level 7, and benefits from destruction, meaning Gandora-G triggers that extra effect, essentially adding another layer of protection for the strategy in the form of a free Turn Silence
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Meanwhile, he had lots of mass removal in case you overextended and cheap removal to trade for your expensive threats