yugioh machina mayhem structure deck YU-GI-OH! Cards 5D's - may be 1st or Unlimited Edition Konami Yu-Gi-Oh Machina Mayhem Starter

If you dont care about that part, this is just an awesome payoff for paradox-style decks, giving you free copies of spells cast from various zones

They are direct copies of the Japanese counterparts

Princess of Whales / Mother of whales has a nice ring to it

Half Counter X TRAP During damage calculation, if a monster you control is being attacked: Target that monster you control

If Pot of Avarice were to be back in the game, it would allow decks like this to recycle all of their resources for future plays, which is a big deal

Banned or Restricted Planeswalkers Some of the best planeswalkers in MTG were so powerful that entire formats warped around them