Angel of Time

Flying
Flash, phase 3: {u} (When this creature becomes
target of a spell or an ability an opponent controls or
if you pay its phase costs, exile it with 3 phase
counters on it. Remove a phase counter at the
beginning of each turn. When there are no counters
left, put it back onto the battlefield.)

You may cast creatures with phase counters on
them from exile by paying their mana costs as
though they had flash.