Some opponents might have effects like Propaganda or Kazuul, Tyrant of the Cliffs, which scale up with the number of creatures attacking
Fighting Flame Swordsman X FIRE Level 4 [ WarriorEffect ] ATK 1800 DEF 1600 If this card is Normal or Special Summoned: You can add 1 Spell/Trap that mentions "Flame Swordsman" from your Deck to your hand
Needing face-up S/T is reeeeeally niche (side note: Fun cheese play, you can banish S/Ts in a further chain link with Fairy Tail Snow to prevent draws) 2b
Blaine is one of my favorite gym leaders, so I was happy to see that they gave him a Charizard in the card game
Along with the fact it can be your commander is even of a reason to put it at the top of this list
The first of the Pot cards to be released after Greed, and it's polar opposite in effect, name, even artwork