The whimsical, jester-like design of Number 7: Lucky Straight has far different abilities from the demonic-looking Number 40: Gimmick Puppet of Strings
Sorting the cards felt like two separate collections that just happened to release on the same day
Recent set Streets of New Capenna had many cards that could feed into Faldorns Strategy Unlucky Witness, Rob the Archives, Professional Face-Breaker, Urabrask, Heretic Praetor and Arcane Bombardment all seem like strong options
Alternatively, you sell it to a local card shop without getting ripped off since you know its worth
A large number of characters enables variety during battles
Understanding the full rarity ladder matters for both collecting and competitive play, because the relationship between rarity and power is not what you'd assume from other card games