Ravaging Riftwurm [Future Sight]

Kicker {4} (You may pay an additional {4} as you cast this spell.) Vanishing 2 (This creature enters the battlefield with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) If Ravaging Riftwurm was kicked, it enters the battlefield with three additional time counters on it.