To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of Serah Farron or Crystallized Serah's first abilities)
As useful as pre-constructed decks are when you start out, theyre not worth upgrading a ton
Jumbo Cactuar qualifies because outside of infinite life, it is a win if it connects
Lorcana Rise of the Floodborn ruby cards Felicia, Always Hungry Mother Gothel, Withered and Wicked Honest John, Not That Honest Raya, Leader of Heart Shere Khan, Menancing Predator Lady Tremaine, Imperious Queen Scar, Vicious Cheater Choosing which ruby cards to build your deck around just got a lot easier with the release of Rise of the Floodborn