FCA cards are legal in Commander, Legacy, and Vintage, and each card is also legal in any other format where its already legal (e.g., Lightning Bolt is Modern-legal)
It also ties into the Knight part of the deck
Play her in a deck with [[Soulherder]], [[Thassa, Deep-Dwelling]], or [[Conjurers Closet]] and start chaining value
Popular Decks Amethyst/Ruby Tempo by LunaLove Emerald Emerald glimmers are flexible
you no longer need to worry about an opponent who sweeps it aside with Wrath of God or whatever everybody else does to handle your legendary board, so its easier to rebuild
Zero to Hero works best when a players board is already filled with characters, allowing them to play a high cost character for free, especially as songs can be played for no ink simply by exerting a character with the same cost or higher