Obosh, the Preypiercer + Gyruda, Doom of Depths Caring about odd or even mana values is a unique deckbuilding restriction, which gets even more restrictive if youre trying to companion Obosh, the Preypiercer or Gyruda, Doom of Depths
Sometimes, promo cards are used as prizes for contests held by The Pokmon Company, such as illustration contests, or competitive Trading Card Game events like the annual Pokmon World Championships
The fact that it returns the creatures to play rather than regenerating them is huge, as it allows decks to be built around exploiting the death triggers of cheap creatures
Dugtrio requires just one Energy to deal 40 damage, and if you happen to get heads in the following coin flip, your opponent wont be able to attack you whatsoever
Overall, I really do like the idea of this deck