It's tough to feel like you're getting your mana's worth, since you need an impressive creature to copy
And thats when the positives truly stop, because the Orca cant be targeted for an attack anyways, and 1200 effect damage is quite trivial when you could be attacking directly for 2900
I have a video on YouTube explaining the rules about EX cards but basically they function like any other Pokemon card, but if an EX card is knocked out, two prize cards are taken instead of one
Being a Trap is no problem, as both Gurifoh (YGOrg Translation) and Black Chaos the Ultimate Magical Swordsman (YGOrg Translation) can place it into your backrow to prepare it for immediate use
[Grass][Water][Electric] Crown Opal - 180 During your opponent's next turn, prevent all damage done to this Pokemon by attacks from Basic non Colourless Pokemon
Its just like how regular currency notes have special holographic features or print marks to make it hard to reproduce