When multiple creatures connive simultaneously, you choose the order
Notably, cascade specifically says you may cast that card for free
It saves your entire board, blanks lethal attacks, and often swings games that look completely lost
Thus a card that dominated the formats it was legal in or has regular play in Modern or Legacy like Atarka's Command, Wild Cantor, Burning-Tree Emissary, Huntmaster of the Fells, Manamorphose, or Bloodbraid Elf, would still need to prove it's chops at the kitchen table
It's the perfect sac outlet: No mana, instant speed, sacrifices creatures and artifacts, and even has relevant combat stats for the three aristocrats players who actually attack with their creatures