If the 10 life thing were replaced with Mindlock Orbs ability, this card would be better in constructed, but it would also be less exciting and paradoxically worth less
Bad Primes that easily go for 1 pack include just about everything other than Donphan, Mew, Magnezone, Yanmega, Gengar, Typhlosion, and maybe Kingdra
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While counting on opponents to have some great creatures to copy is okay, you'll want to seed some additions of your own like Vigor and Consecrated Sphinx (both of which get better when you have two copies of them in play)