Lethrblaka, Alagaësian Terror

Flying, shroud, infect, vigilance, fear

When this card enters the battlefield, sacrifice two creatures or give yourself poison counters equal to
its power.
{b}{t}, Sacrifice a non-legendary creature: target
creature gains X -1/-1 counters where X equals the sacrificed creature's power
{b}{4}{t}: Put a -1/-1 counter on each creature target opponent controls, then proliferate.