Enchantment
Flash
Vanishing 3 (This permanent enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
When Judge's Decree enters the battlefield, exile another target spell or nonland permanent. When Judge's Decree is no longer on the battlefield, the exiled card's owner may cast that card without paying its mana cost.