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While this new Fusion Monster is on the field, you can hijack an opponent's Normal Spell/Trap Card or monster effect, turning it into a discard effect that unleashes your Dark World monsters' true power

Not only that, but it can trigger multiple times per turn just by casting non-creature spells

You have to mail your collection to Troll and Toad

As long as you draw a Pikachu ex card in the first or second turn, you can reliably deal 90 damage in a turn with Pikachu ex's Circle Circuit attack without relying on coin flips or Supporter cards

Both fall into very niche decks with reasonable sideboard answers and not necessarily all the tools to work outside of Vintage