Either theyre comparatively bad, dont have synergy with your deck, dont fit the colors youre playing, or are just weak cards in general
Each time you sacrifice something, Korvold grows bigger and replaces itself with a card, so your board keeps moving while your hand stays full
Commanders like Jeleva, Nephalias Scourge and creatures like Etali, Primal Storm can actually spin this drawback into a positive, exiling powerful cards from the less aware and giving you access to them instead
Another three-drop, this time in White, but a common
The winner of this sub-game deals damage equal to half of his/her opponents life total
The new planes including the TARDIS bay, which adds cascade to the first spell cast on each turn for mana value two or more - allowing the player to exile cards from their library to the bottom of their deck until they reach a nonland card worth less than the card they played, before being able to cast it for free
