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
Explore the Deck ideas of your favourite Duelist with the anime-themed Maze of the Master
Cyberse Reminder Type XYZ Monster Attribute LIGHT Typing Cyberse Level/Rank 3 ATK 1800 DEF 800 Typings Xyz / Effect TCG Date 2019-05-02 OCG Date 2019-01-12 Card Text 2 Level 3 monsters You can detach 1 material from this card, then target 1 "Cynet" Spell/Trap in your GY
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
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