I prefer typical soft see-through sleeves as theyre the least damage prone, accepted by all grading companies and easiest for everyone to get cards in / out (I often sell cards at the card shop)
At best youre going to Strip Mine your opponents out of the game without repercussions
However, if the exiled creature was copying something else when it was last on the battlefield, Curie copies whatever that creature was copying, plus the additional ability
Entei with the Theta Double trait has seen a lot of play during Cities
Im going to stare at the copy of Krang, Utrom Warlord in fracture foil real hard for a bit, but theres a lot Im going to spend on other things too
Things to Consider Before Buying a PSA 10 Charizard Budget and Investment Strategy Ask yourself: are you buying purely as an investment or as a passionate collector