On an empty board she makes beaters, with topdeck mode she can haste-enable your creature to hit first, she can kill or trample out of a locked board state, and more
I will argue, though, that what really killed the hype for Set Champs was the fact that the prize card, Mirabel, Family Gatherer, was and still is completely unplayable
Laelia, the Blade Reforged Laelia, the Blade Reforged found its way into the reconstructed decks, interestingly enough
In some ways, the ancient Greeks had more nuanced ideas about monster behaviour than we do
We also have Commanders that gain tons of life, Commanders that combo off, and Commanders that care about a Creatures Toughness rather than it's power
The first iteration of games like this must be so difficult