>>36654178First thought is to run it with this cool guy in Expanded. Nihilego alone puts it at 130 damage after poison, boosted to 180 after Virbank and Choice Band. Throw in something that can Burn as well (GRI Salazzle) and you're swinging for 230 off one energy on top of the free Gust of Wind effect. Run it with Scoop Ups and AZ/Acerola to reuse it and fit in Hypnotoxic Lasers.
In Standard, you can run it with Celestial Storm Ariados (which has Ninetale's exact attack) or Alolan Muk GX (which does 10 + 70 per special condition, but costs [D][C][C] instead of just one energy), but both of those Pokemon are obviously worse. But maybe the deck will do better overall in Standard?
Burning Shadows Seviper
where's my Zangoose card Nintendo can boost damage, but I don't think it's necessary. There's also Darkrai-GX who can insta-KO with its GX attack, but that's also expensive and a GX attack.
I personally run this deck in Legacy with Houndoom Prime, Munna, and Amoongus, the last of which is exactly like Nihilego. It's pretty fun. Wish I could use Nihilego there.