They Who Left the Caravan

Menace
Whenever a creature you control dies you may pay {b/r} when you do put +1/+1 counters on They Who Left the Caravan equal to that creature's power.
{b}{b}{r}{r}, {t}: They who left the Caravan deals X damage to any target where X is equal to the number of +1/+1 counters on it.