Suspend (Rather than cast this card from your hand, pay and exile it with four 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.)

Potentially inspired idea:

When Gnaomie, Trickster of Tunes comes into play, if it came into play from exile, you may flip a coin. If you win the flip, look at the top four cards of your library. You may play any one of those four cards without paying its casting cost.