The English version's name is 'Hallo-Ween!', not the Japanese version's 'Trick or Treat!', and is similar to this in other TCG language versions
If you're playing an aggressive or midrange tribal deck and you're only including sixteen creatures, you have to ask yourself: "Is it even worth playing all of these tribal cards in the first place?" If, for example, you only have enough creatures to have a couple in play at any given time, you're not maximizing your tribe's abilities
She has 2 Strength, 4 Willpower and 2 points of Lore too
Each Collector Booster contains a foil metropolis land, which could be any of the triomes or common lands like Waterfront District
PKMN T8NR didn't specify how difficult this deck is to play
E.g., you could have a red box with the black texture to show a red/black deck design