While Pokmon Trading Card Game Pocket draws inspiration from the experience of opening physical Pokmon TCG booster packs, we are unable to share specifics at this time, The Pokmon Company International told Polygon via email
The ability to banish a champion, namely Muse as depicted in the art, (or Thought Plucker/Mist Guide Herald/Necromancer Lord [preventing Final Task], Bodyguard [preventing it from being recalled], Dark Knight [getting around unbreakable], Warrior Golem [preventing the recycle], Spore Beast, Courageous Soul, Fire Shaman, Guilt Demon, etc.) without any other help is insane
By itself, Owen Grady operates like a Viashino Lashclaw and Blue is just a 5/4 for 4 mana
At sorcery speed during your turn, you can tap one creature with 4 power (or two with 2 power each, or even build up over multiple turns) to add four charge counters and awaken the Sweeper as a 2/2 flyer