Savage Warmonger

Superchain {b}{r}, Sacrifice a Creature (Whenever you activate an activated ability of an Ally you control, you may pay this card's superchain cost. If you do, activate one of this card's activated abilities, ignoring all costs of that ability.)
{b}{r}, Sacrifice a Creature: Put a +1/+1 counter on another target creature you control.
{3}{b}{r}: Savage Warmonger gets +X/+X until end of turn where X is the number of creatures that died this turn.