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
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
Costs one Electric-type Energy Card and three Colorless Energy Cards
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
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