If there is no rotation and B&W rules, you better pray that you start Sableye and win the flip with your Gyarados deck.
Then you can play it as if it was a Sabledonk
Also Zekrom - a 130 HP Basic that can set up T1 and OHKO even a Belted Gyarados.
Gyarados gets some great new cards to use (if they are in the set), but it gets some nasty enemies as well.
I'm curios, how does Zekrom set up T1?