You have a "full party" if the number of creatures in your party is four (that is, you control a Cleric, a Rogue, a Warrior, and a Wizard, and they are four different creatures)
Here's the first two cards we got: You might have seen my reaction on Twitter, as it really took off, because I summed it up simply as "Wow I ******* hate everything about this product." That was my initial gut reaction, both coming off of both what the announcement page provided and what it meant for the product as well as finally getting a look at these cards
They each gave you some form of strike, and two colors of protection, including from each other
The only other upside I might see is with proliferate, but even with that strategy, the mana value seems too expensive and curve-unfriendly
The location itself works well with King or Prince characters, lowering the cost of your other characters by one when you have a royal on the rock