After sacrificing Zack and sending him to your graveyard instead of your command zone, reanimation effects like the one on Sun Titan can bring him back into play or to your hand to restart the gameplay loop , allowing you to keep stacking counters on your creatures
If it didnt, it wakes up from the graveyard and returns to the battlefield, stronger than before
Or Thopters, or Pirates, or Ninjas, or Pirate Ninjas flying on Thopters
[121] In 2016, it was the year's top-selling toy in the strategic card game subclass
Sure, you have to discard all that Energy from Umbreon ex, but the trade-off can be substantial, especially if you find yourself in a situation where you need to take just one Prize but cant Knock Out an opponents Pokemon
Once they have a card underneath them, the Whisper can become complete and they can gain new stats and/or ability