Unstable Time Rift

Counter target spell.
Suspend 3 - {w} (Rather than cast this card from
your hand, you may pay {w} and exile it with 3 time
counters on it. At the beginning of your upkeep,
remove a time counter. When the last is removed, cast
it without paying its mana cost.)
{2}: Add or remove a time counter from Unstable
Time Rift. Any player may activate this ability.