From that set, there is only one card that has more than two attributes (attacks, Pok-Powers, Pok-Bodies, or Abilities)
You choose targets for that ability as it goes on the stack
Freejam Regent has Flying and the new Improvise mechanic, which allows you to tap your artifacts to help pay for the casting cost, each artifact paying for one generic mana
This card has one of the toughest pull rates in Brilliant Stars and the $50 price it is currently fetching reflects that
Aside from being slightly more expensive to cast, the main difference between them and this card is that those cards trigger off of creatures entering the battlefield rather than being cast
My opponent (and some other members of the peanut gallery) were commenting about how that was about the worst Mulch imaginable