There was a time when you could get Stone Calendar for a very cheap investment
It also allows you to do a removal check more frequently, with the extra supply of fetchlands you can consider just trying to put Polymorph or Indomitable Creativity on the stack 2 or 3 turns in a row and forcing your opponent to have an answer each time
But more interesting than a Standard format with a dominant strategy was a brand new Limited format which seemed remarkably well-balanced across many colors and archetypes
Why Bracket 4 Reanimator Is Competitive Reanimator decks are a good way to keep pace in a faster game since you can cheat out big threats early
If a turn has multiple combat phases, the ability can only be activated before the beginning of the declare attackers step of the first combat phase in that turn
This change in game pace could also match the narrative beautifully (what we in the business call ludonarrative consonance): while in Amonkhet, the world was defined by living warriors pushing themselves to the limit to pass the trials of the gods, in Hour of Devastation, people are just trying to survive against an ever-growing army of killer zombies