Remember, these cards care about how much mana you actually spent on the spell, not the printed mana value so the higher tiers of Ice Magic and Thunder Magic, the flashback casts of Dreams of Laguna and Laughing Mad, and a big Syncopate or Choco-Comet will all work to trigger your stuff
After all, as more boxes are sold and opened without finding a Golden Chocobo, the odds for all other Collector Boosters having one increase
In addition, Tinker Bell - Most Helpful offers a useful effect when you play her
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The fact that she flips into a Planeswalker just by drawing three cards, which, by the way, her Clue helps you do, makes her an absolutely fantastic card in competitive formats
Necroduality is the perfect enchantment for this deck