Hateful Howler

{t}: Place a pain counter on Hateful Howler.
{1}, Sacrifice Hateful Howler: Hateful Howler
deals 2 damage to target player and each creature
that player controls.
{t}, Sacrifice Hateful Howler: Hateful Howler
deals damage to target creature or planeswalker
equal to the number of pain counters on it.