For example, in Urza's Destiny (the set where I was the entire design team), there were two different cycles that explored effects that scaled based on how many cards of a certain color were in your hand
If you use its activated ability, which requires you to sacrifice another creature, you get to not only draw a card, but also put a land into play
Commander Mondrak, Glory Dominus If one or more tokens would be created under your control, twice that many of those tokens are created instead
Shane: Enchanted cards are where the Art Directors on the team get to explore new art styles, sometimes drastically different than the rest of the set
And if your opponent lets him live for a turn, you can turn him into Ifrit, Warden of Inferno , a 9/9 that immediately fights another creature, before pumping out a pile of red mana the next turn