Palkia and Dialga Legend

Although I don't actually play them, I'm an avid collector of the cards.

Upon buying my first two Triumphant boosters, I came across the top half of the Palkia and Dialga Legend card. I have a few Primes, a few EX, most namely Zapdos EX, and a couple of rare Delta Species, such as Dragonite, but I'm pretty sure this is the rarest card I own.

What are the chances of me finding the bottom half?

Your chances of pulling it in a pack are fairly low... I have it and would be willing to trade it to you. What Primes do you have?

I have Donphan Prime and Lanturn Prime, and I think MAYBE Steelix Prime, but I think I might have already traded it away