Sulfuric Miasma

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Sulfuric Miasma deals 2 damage to each player and each planeswalker. Exile it with a time counter on it. It gains suspend. (At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)