cards with amass mtg Mass, 39 Summons of Saruman - Commander:

In terms of rarity, the Dragon is only second to the 1996 World Champion on a technicality

Creatures that have an abilities that require you to sacrifice a creature are what are considered the Aristocrats

Well, you can drop all of them into play

While we've had dominant decks and cards like Collected Company, Siege Rhino, Pack Rat, and Rally the Ancestors, those formats didn't see huge drops in attendance, and for the most part, by the time the outcry got loud, the problem card was already close to rotation (if you look at Rally and Bant Company, their most dominant times were in the two or three months before they rotated from the format)