If you were lucky, you had maybe one Mirror Force in your deck, which left room for a stew of lesser battle traps like Negate Attack, Draining Shield, and even Fairy Box
Explore the Deck ideas of your favourite Duelist with the anime-themed Maze of the Master
I mentioned that this is the one arena that changes permanently, so if you didn't complete it when Garurumon was the final opponent, well now you can't get 100% story completion, because defeating Mimi causes MetalGarurumon to appear at the arena instead, locking you out of the previous one
When this card is Special Summoned: Special Summon 1 Level 8 or below "Sin" monster from your Deck or GY
While building a deck centered around Mew ex might not be ideal, adding it to well-established Psychic-Type decks can provide a significant boost
Fancy sleeving this up and trying it