That can be a single card youre leaning your whole deck on (but not in a way that falls prey to Counterspell or Prismatic Ending), or it has to be multiple cards with their own massive impact
Fetch up something like End-Raze Forerunners and laugh as you put an additional 19 power on the board at least
Early feedback showed that many people said FINAL FANTASY was their first introduction to the RPG genre, so while we tried to make every card as specific to FINAL FANTASY as possible, there was a lot of merit in calling out hallmarks of RPGs in general with card designs that were resonant and understandable without needing to know any game-specific lore
And it's on a song, which I like
Permanently and perfectly fixing your mana, Mirri effectively changes the rules into a completely different game
Cards like Dire Tactics and Mass Appeal reward you directly for controlling humans, while others like Banner of Kinship, Chronicle of Victory, or Roaming Throne are must-have colorless cards for general typal support