The Ability Subjugating Chains allows for a free swap with a Benched mon, Poisoning the new Active, and the Attack Irritating Burst does 60 damage for every Prize Card your opponent has taken
While you'll have to wait until the official release on November 21 to purchase singles from your local card store or use them in any local competitive matches, you'll still be able to purchase and unpack any of the sealed products during the pre-release window
One common method is to simply build around a legend that rewards a unique and fun game plan, even if it isnt the most broken thing to be doing
The most balanced decks all have some sort of synergy to them, though you can pretty much base any deck off of your favorite Pokmon
If I didnt already have a few, Id buy in ASAP
They also list the dates of the releases in case you don't keep the release schedule handy