1 Underdark Rift
Most combos the average player considers degenerate are garbage, competitively, and typically the best 'combo' at tables with powerful decks and knowledgeable players is A Good Deck + Ad Nauseam or Doomsday, or something
There are a bunch of options, really, from Baleful Mastery and Infernal Grasp, to Price of Fame or Dismember
[5] Its no surprise that Imakuni would make the list again, as hes famous for his silly-looking cards
The precon for Kadena, Slinking SorcererKadena, Slinking Sorcerer just did face-down cards so much better
Consequently, it's prudent to take a look at the most powerful sacrifice effects in Rakdos colors so that we can get a better idea of what kind of support this new adversary has