Cecil's journey from Dark Knight to Paladin really shaped my earliest understanding of how video games can explore the concept of narrative in ways other media cannot
It does have an upside, but that is best in spell slinging decks, so you won't get much milage of this
You can also probably get away with just running one copy in the deck if you have a card you use to add a little utility or support to your strategy, or one that you use as your silver bullet against certain strategies that are more common in the metagame
Originally all werewolves had the text At the beginning of each upkeep, if no spells were cast last turn, transform this card on the front side and At the beginning of each upkeep, if a player cast two or more spells last turn, transform this card on the back
Every color has access to it as a solid way to either make its creatures modal (via X-spell creatures that enter with X counters) or capable of growing into the late game