Overall, Korvold is powerful, flexible, and borderline unfair in longer games
Time has been somewhat cruel to Sarkhan, as the price of the card has more than halved since the launch of Takir: Dragonstorm
The shadow was only added later in the reprint
In some cases, you can use Sinkhole to destroy a site, set your opponent back, and if your opponent isnt careful with where they cast their minions, you can follow up with Cave-In , Stormy Seas , or Earthquake to remove multiple cards from the realm devastating your opponents board while setting them further behind in board presence
My concern is always whether that system will continue to update
Look for it online at Amazon or check with your local game store.