it doesn't have any new cards, and technically it's considered part of the same set, but the Special Edition Collector Boosters are very different from the regular edition
Willpower: Willpower is a number inside a shield on the right side of the card, and it tells you how much damage a card can take before its banished (removed from the game)
Chalice on one is devastating for decks like Murktide, Hammertime, Deaths Shadow or Burn, while Chalice on zero turns off any Cascade shenanigans as well as a quick start from an affinity list
There is a ton of work a relatively small number of people do to bring this dynamic, creative, engaging, and multifaceted game to millions of fans around the world, and the hits far, far outweigh the occasional misses