It requires two tributes to actually get out on the field, and it does nothing else but act as a giant beat stick
For [1RR], it starts at 130 damage and then adds 50 more damage for every Prize card your opponent has already taken
C Common Moon Mirror Shield X SPELL Equip If the equipped monster battles your opponent's monster, during damage calculation: The equipped monster's ATK/DEF become equal to the ATK or DEF (whichever is higher) of the opponent's battling monster +100, during damage calculation only
To unlock the Promo Mewtwo card, for example, players need to collect 5 Mewtwo cards , making it extremely tricky to get hold of
In comparison, Secret Rares can be Full Art or Half Arts but with additional artwork schemes such as alternative holofoil scheme, shiny scheme, or a gold trim