Its a big hurdle placed in the opponents path, and the time it takes them to get over it is time you can spend catching up or winning the game yourself
For example, since flipping Sephiroth only requires four Creatures to die, regardless of who controls them, some of the strongest cards in the deck are edict Creatures, or Creatures that force each player to sacrifice when they enter
You can usually play this on turn four, if not earlier
Each of my last two 1 st s had an instant at the top, of the rare and uncommon variety, but this time we have a common instant
Collective Effort is another spell I think may see reasonable amounts of play because of emerge, letting you kill a big creature while also pumping your team to commence an alpha strike