Thankfully, in matchups where Karn's static ability is dead, we can still get a ton of value from the planeswalker by using it to tutor various Stax pieces from our sideboard, including: More copies of God-Pharaoh's Statue and Thorn of Amethyst
I recorded the above video on a Google Pixel 8, which can handle more demanding games
You can even fetch it up with Urzas Saga if youre up against graveyard decks and need to find some early intervention against cards such as Entomb or Buried Alive
Contagion Engine is, understandably, fairly expensive to cast and use
It is a weak purchase when you are only using it as an expensive shortcut to one exact SAR
In moments like this, you'll just wish you were playing with a deck that looks to win in one of the traditional methods, like basic or Commander damage