Worldfire [Magic 2013] Human Assassin Does it reflect the future

Does it reflect the future that once was or the past that can never be

Set: Aetherdrift Special Guests Type: Creature — Elemental Knight Rarity: Mythic Cost: {2}{W}{W}{W} Vigilance

Set: Ravnica Remastered Type: Creature — Troll Skeleton Rarity: Rare Cost: {4}{G} Golgari Grave-Troll enters the battlefield with a +1/+1 counter on it for each creature card in your graveyard

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Worldfire [Magic 2013] Human Assassin Does it reflect the futureSet: Magic 2013 Type: Sorcery Rarity: Mythic Cost: {6}{R}{R}{R} Exile all permanents. Exile all cards from all hands and graveyards. Each player's life total becomes 1. Even the smallest spark may set a world ablaze.