Clockwork Fox [Commander Legends: Battle for Baldur's Gate] Set: Commander Legends: Battle for Baldur's Gate Type: Artifact Creature Fox Rarity: Common
If you do, you may cast that card without paying its mana cost if the two spells have the same mana value
Though the test card was never printed in a real set, it established the key design question: What if the cost you pay determines which part of a spell's text actually matters
Again, free cards are a problem
Im most inclined to suggest a Voltron playstyle for Kefka, since both halves benefit from combat buffs, but honestly, you can build any deck around him
Cemetery Reaper Even the foils of this are low, and while the ability is useful and relevant, theres too many copies to make an impact