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Those ideas can come from anywhere

2011 - Yule Ooze In name and context, Yule Ooze is a reference to a Yule log, which is a type of desert associated with Christmas

These cards trigger a lot of nostalgia for a lot of people and they are willing to pay for that thrill of collecting these cards again

Credit: Wizards of the Coast Venat, Heart of Hydaelyn / Hydaelyn, the Mothercrystal BPhillipYork: Great for legendary good stuff, Jodah, the Unifier or Captain Sisay, exiling a troublesome permanent for 7 mana is expensive and it's okay once it flips to a 4/4 God creature

Naturally, all these naming conventions lend themselves to deckbuilding synergies nicely