A card like Starnheim Unleashed fits perfectly in the deck when you can sink excess amounts of mana into casting the spell for its foretell cost
your opponent draws 1 card, and if they do, you add 1 "Ogdoadic" monster from your Deck to your hand, except "Zohah, the Ogdoadic Boundless", then, each player sends 1 card from their hand to the GY
Korvold works best in sacrifice decks as you may expect, as sacrificing gives Korvold +1/+1 counters and draws you cards, keeping your hand fresh by simply playing your deck how you want to play it
Since the current meta allows for up to eight benched slots with the right stadium, this card provides Tier 1 power for less than the price of a cup of coffee
Why 3 Krebons instead of 2 Krebons and a Commander