Discarding a Trap Card you dont need, to destroy a monster and get back a roid from your Graveyard is just great card economy, especially when youre getting Steamroid , Rescueroid , or Drillroid and blowing away a tough problem monster like D.D
SPYRAL Super Agent also helps out with the deck with going second as it can help dismantle the opponent's backrow before attempting to make a combo play
Verhey has been clear that the original 40 were identified out of convenience and that the most recent additions reflect what the community believes to be Game Changers, but these 61 set the tone for what is to be expected of a Game Changer
If you're looking for recursion, then Zombie Apocalypse has you covered
Then attach a Dark Energy card from your discard pile to this Pokmon
Yuma: Can I at least get a "please?" Astral: Stop making dumb mistakes, please