Its remarkable just how often it has been largely impactful on combat, whether creating or breaking battlefield stalls, as well as combining with burn or combat tricks, such as Divine Deflection
empty Sorcery Freerunning (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.) Untap all creatures you control that attacked this turn
For Grand Prix, you get Progenitus (uhhhh)
Quoting thegamer, the cards are are selected based on their gameplay and story value, and in particular how each character relates to the overall narrative of the set
His mechanics are definitely eye-opening, but other than instructing you to track the countdown using his card art, they lie well within the range of constructed build-around wincon. Itll always take at least five spells to doom your opponent, and the odd rules templating around the countdown does at least stop abuse from Vampire Hexmage and the like