Speaking of difficulty, Arkham Horror: The Card Game does an excellent job of providing variable difficulty levels for players
(Create an Incubator token with X +1/+1 counters on it and ": Transform this token." It transforms into a 0/0 Phyrexian artifact creature.) Whenever this creature enters or attacks, mill two cards, then incubate X, where X is the number of creature cards in your graveyard
Its filler at best in draft, let alone any constructed format
Companies tighten and loosen over time, and each has its own tolerances
The Ruinous Powers I love how much this card brings the literal Chaos of its titular powers, while still managing to be a quite effective deal for its mana
2/ Eternatus VMax We're now getting close to the big money in number one, but before that, we have Eternatus VMax