Quicken

The next sorcery spell you cast this turn can be cast as though it had flash. (It can be cast any time you could cast an instant.)
Draw a card.

Pioneer Masters

A skilled Izzet chronarch can carry out an epic vendetta between the fall of one hourglass grain and the next.

Ravnica Remastered

The next sorcery spell you cast this turn can be cast as though it had flash.
Draw a card.

Duel Decks: Mind vs. Might

The next sorcery card you cast this turn can be cast as though it had flash. (It can be cast any time you could cast an instant.)
Draw a card.

If you cast multiple Quickens on the same turn, they'll all apply to the very next sorcery spell you cast.

You don't choose a sorcery card when Quicken resolves. Rather, this sets up a rule that is true for you until the turn ends or until you cast a sorcery card, even if you cast that sorcery at a time you normally could.

After Quicken resolves, you can Suspend a sorcery in your hand any time you can cast an instant. As soon as you actually cast a sorcery, you lose this capability.