[This makes her effect a little more live, especially with all the boosts you have going for them, and it makes the wording a little easier to understand] Peace Phermones should be re-worded: Monsters with 2000 or more ATK cannot declare an attack
Firstly, the rarity of these cards is a significant factor
Noxious Grasp being able to go after Hydroid Krasis and Teferi makes it occasionally come in against something like Bant Scapeshift, but the most attractive split-ability on it is that it can hit both Teferi, Hero of Dominaria and Lyra Dawnbringer
One is currently listed on eBay for $1,000,000 Buy It Now at the time of writing and theres no information of previous listings or sale prices
That's probably because Korvold does everything you want leading a Jund Sacrifice deck, whether you're leaning more into using creatures or Treasure tokens as fodder