The defensive nature of Yang Zings makes them an ideal stun strategy. Most of the successful, Regional-topping Yang Zings we've seen this format have been exactly that: slow, trap-heavy strategies with numerous game one floodgates. John Leveille placed in the Top 8 of the Lindenhurst Illinois Regional with his take on the theme, and added a few surprises to his build.
Like other Yang Zing players, Leveille ran three Mistake in his Main Deck. Mistake has excellent match-up utility this format and it's hugely effective against Satellarknights, Nekroz, and Qliphorts. It's an obvious pick for a deck that plays only one search card. T.G. Striker and Bi'an, Earth of the Yang Zing let Leveille Synchro Summon Naturia Beast to win the early game against Nekroz and Necrovalley acts as a searchable floodgate against Burning Abyss and other strategies.
Speaking of which, the lone Terraforming in Leveille's build searches out more than just Necrovalley; it also gets you Black Garden, one of the most complicated cards in the game. Black Garden's ATK-halving, token-generating, and Special Summoning effects all work in Leveille's favor. Monsters that would have been difficult to destroy before, like Nekroz of Trishula or Qliphort Disk, lose half their ATK. Leveille could use the tokens to clog his opponent's field, give Burning Abyss players a non-Burning Abyss monster, or turn the Level 2 Rose Tokens into Synchro Materials. He could also destroy Black Garden while two tokens were on the field to Special Summon a Bi'an, Earth of the Yang Zing from his graveyard.
Yang Zings have a couple of interesting interactions with Black Garden thanks to Pulao, Wind of the Yang Zing and Yang Zing Creation. If Pulao is used for a Synchro Summon, that Synchro Monster won't be affected by Black Garden and gets to keep its ATK. The destruction of Rose Tokens also triggers Yang Zing Creation, netting Leveille even more monsters. Yang Zings have just received new support in Crossed Souls and it might just be good enough to propel this strategy into Championship-level competition.