yu gi oh master duel evil twin deck Evil☆Twin Ki-sikil (Alt Art) - Ultra Rare SLF1-JP079 Selection 5 - YuGiOh In-Depth Live☆Twin Guide | Master

the Levels of both that monster and this card become the combined Levels of those 2 monsters until the end of this turn, also you cannot Special Summon from the Extra Deck for the rest of this turn, except Machine Xyz Monsters

Its the same card as the other Mewtwo but in Hyper Rare form

This type of binder is great if you want the absolute maximum protection (essentially combining a hard case with the organization of a binder)

5D's 2009 Deck de Dmarrage: Yu-Gi-Oh

Although, it does come at a cost since the Pokemon you choose to build will suffer through a couple of damage counters being placed on them

Honestly, I'm not even that great at the strategy