Trijaw

{t}Jaws - when this creature enters the battlefield, put two [1/0] counters on it.
{t}Bite - if there is at least one [1/0] counter
on this creature, discard a [1/1] counter and
add a [-1/-2] counter to your opponent's creature.
They have three heads worth of teeth but
zero heads worth of mercy - stormfleet commander rakzos