The goal of this deck is to pile on a metric tonne of damage counters using Vespiquen ex then moving them around, getting KOs with Dusknoir. The other Dusknoir in the deck also helps with this goal by bringing in a small basic from your opponent's hand and damaging it, making it a free kill for the queen bee. Surprise Box is also an unepected star here, as you can put that same small basic back into your opponent's hand, then call it back down using Dusknoir!
I am contemplating on using Surprise Box or Echoing Horn, so please let me know what you think!