yugioh spellcaster command deck 5D's Spellcaster's English Structure [Toy] : Toys & Games and spells change the fate of many lives Structure Deck: Spellcaster's Command #SDSC-EN008

Jigglypuff #54 Pokemon Jungle Keep track of your collection value over time

I felt the card tapped into something potent enough to be a whole mechanic (having an effect scale on colored mana symbols in the mana cost of cards)

Vortex, for instance, can be used against a multitude of strategieswhether its Amaryllis with Tytannial, Heroes with Absolute Zero, or even Lightsworn to clear Judgment Dragon and/or Kristya

Credit: Wizards of the Coast Ulamog, the Defiler Marcy: I love how just bonkers powerful this card really is, like your opponent is likely to just scoop to losing half of their library, but then they also have to deal with something that will otherwise very likely wipe out every permanent they control when it swings, and also one shot them