Bezhungu Silencer

At the beginning of your upkeep, if three or more creatures you don't control have -1/-1 counters on them, put a -1/-1 counter on each creature with a -1/-1 counter on it.
{5}{b}, {t}: Put a -1/-1 counter on target creature and each other creature on the battlefield with the same name as that creature.
Each beat of the drums slows your heart by one, until the beat of your heart falls silent.