yu gi oh hero deck THE BEST Elemental Decks In Yu-Gi-Oh Yugioh Tournament Deck lists :

I really like the double strike option and use it regularly to win a combat I otherwise wouldn't or to get double triggers from a "Deals combat damage to an opponent" trigger, such as Shadowmage Infiltrator or Avenging Druid

Gardevoir ex Steam Siege (Secret Rare, 116/114) With striking lineless art and a Yveltal cameo, this Gardevoir ex card stands out as one of the most beautiful from the XY era

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To a Random Player at the 30-Minute Mark Just for fun, you can announce a random raffle when the clock strikes half past the hour (for example, at 4:30)

Thats a lot of good stuff for a single booster box, and if you look at it from purely a value perspective, its a no-brainer