Ravaging Riftwurm{1}{G}{G}

Creature — Wurm

Kicker {4} (You may pay an additional {4} as you cast this spell.) Vanishing 2 (This creature enters 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 this creature was kicked, it enters with three additional time counters on it.