Here are my decks for the first 7: The first was built around Hidetsugu, Devouring Chaos - Commanding Hidetsugu, Devouring Chaos | Article by Abe Sargent (coolstuffinc.com)
Not only is this card a sacrifice engine, but the Emblem it can provide pushes it into a different league entirely
This is also what makes board wipes so good in Voltron - so long as your Voltron creature is protected from them - as it evens the playing field back in your favor.
2025: Vivi Ornitier from Final Fantasy Well, we're not quite all the way through 2025 yet, but we currently have an easy frontrunner for most broken card of the year in Vivi Ornitier
Its easy to imagine this pattern continuing as each color settles into its own unique way of relating to treasure, just as WotC has built up signature card draw variants in red, black and green
V cards have higher HPs than their regular forms, can be played immediately like Basic cards, and can potentially possess stronger moves or abilities than they regularly have